Britney Spears headed back to Las Vegas for brand-new residency

Britney Spears is headed back to Sin City.

ET has learned that Spears will have a new residency at the Park Theater at Park MGM, slated to begin next year at the theater inside the new Park MGM Resort. The 36-year-old singer will join other A-list performers with residencies at the Park MGM, including Cher, Ricky Martin and Bruno Mars, as well as upcoming shows from Lady Gaga and Aerosmith.

Spears is scheduled to make an appearance on Thursday night in front of T-Mobile Arena in Vegas. The event has been publicized as a "Spirit Day" rally for GLAAD, but will likely also serve as the announcement for her new show, which comes just days before the 20th anniversary of her iconic debut hit "...Baby One More Time."

ET has reached out to reps for Spears, Park MGM and Live Nation. 

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Britney Spears' Piece of Me tour
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Britney Spears' Piece of Me tour
I’ve always loved the UK and this night just made me love it even more 🌈🌈🌈 #BrightonPride
BRIGHTON, ENGLAND - AUGUST 04: Britney Spears performs on stage during the Britney Spears 'Piece Of Me' Summer Tour - Brighton Pride at Preston Park on August 4, 2018 in Brighton, England. (Photo by Dave Hogan/BCU18/Getty Images for BCU)
BRIGHTON, ENGLAND - AUGUST 04: Britney Spears performs on stage during the Britney Spears 'Piece Of Me' Summer Tour - Brighton Pride at Preston Park on August 4, 2018 in Brighton, England. (Photo by Dave Hogan/BCU18/Getty Images for BCU)
One of my favorite stage outfits 🖤 Hollywood, FL are you ready for #PieceOfMe tonight?? #FBF 🐇👠🍀🍎🌸🌺👒🗝🌷
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images )
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According to the Daily Mail, Spears' new contract has her earning $507,000 a show, making her the highest-paid entertainer in Vegas, even beating out Celine Dion. Last month, Dion announced she's ending her Vegas residency at Caesars Palace after eight years.

Spears appeared on The Ellen DeGeneres Show earlier this month and teased her big news.

“I have a huge announcement to make," she said. "My announcement is that I have an announcement. I can’t announce it until Oct. 18."

Spears ended her hugely successful Piece of Me residency at Planet Hollywood on New Year's Eve after a four-year run. However, in January, she announced that she was bringing her Piece of Me show across North America and Europe. The tour ran from July 12 through Aug. 24. 

A source told ET at the time that the pop star very much enjoys the lifestyle of touring.

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Britney Spears out and about in recent years
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Britney Spears out and about in recent years
This picture of Britney 😍😍😍 https://t.co/bCfLyocpBU
PARIS, FRANCE - AUGUST 27: Britney Spears is seen in Paris ahead of her two 'Piece of Me' tour dates on August 27, 2018 in Paris, France. (Photo by Marc Piasecki/Getty Images for BCU)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0903 -- Pictured: (l-r) Jimmy Fallon as Sara, Britney Spears as Abby during 'Ew!' on July 26, 2018 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
BRIGHTON, ENGLAND - AUGUST 04: Britney Spears performs on stage during the Britney Spears 'Piece Of Me' Summer Tour - Brighton Pride at Preston Park on August 4, 2018 in Brighton, England. (Photo by Dave Hogan/BCU18/Getty Images for BCU)
LONDON, ENGLAND - AUGUST 24: Britney Spears on stage during the 'Piece Of Me' Summer Tour at the O2 Arena on August 24, 2018 in London, England. (Photo by Gareth Cattermole/BCU18/Getty Images for BCU)
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images for BCU)
BEVERLY HILLS, CA - APRIL 12: (EDITORS NOTE: Recrop of image number 945532332) Honoree Britney Spears (L) and Sam Asghari attend the 29th Annual GLAAD Media Awards at The Beverly Hilton Hotel on April 12, 2018 in Beverly Hills, California. (Photo by J. Merritt/Getty Images for GLAAD)
NATIONAL HARBOR, MD - JULY 12: Britney Spears performs on stage during her 'Piece of Me' Summer Tour Opener at The Theater at MGM National Harbor on July 12, 2018 in National Harbor, Maryland. (Photo by Kevin Mazur/BCU18/Getty Images for BCU)
BEVERLY HILLS, CA - APRIL 12: Britney Spears attends the 29th Annual GLAAD Media Awards - Arrivals at The Beverly Hilton Hotel on April 12, 2018 in Beverly Hills, California. (Photo by David Crotty/Patrick McMullan via Getty Images)
BEVERLY HILLS, CA - APRIL 12: Honoree Britney Spears accepts the Vanguard Award onstage at the 29th Annual GLAAD Media Awards at The Beverly Hilton Hotel on April 12, 2018 in Beverly Hills, California. (Photo by J. Merritt/Getty Images for GLAAD)
BEVERLY HILLS, CA - APRIL 12: Vanguard Award recipient Britney Spears poses backstage at the 29th Annual GLAAD Media Awards at The Beverly Hilton Hotel on April 12, 2018 in Beverly Hills, California. (Photo by J. Merritt/Getty Images for GLAAD)
HOLLYWOOD, CA - FEBRUARY 24: Britney Spears attends the 4th Hollywood Beauty Awards on February 25, 2018 in Hollywood, California.(Photo by JB Lacroix/WireImage)
LOS ANGELES, CA - FEBRUARY 25: Singer Britney Spears attends the 4th Hollywood Beauty Awards at Avalon Hollywood on February 25, 2018 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES, CA - NOVEMBER 29: Sean Federline, Jayden James Federline, Britney Spears and Sam Asghari attend a basketball game between the Los Angeles Lakers and the Golden State Warriors at Staples Center on November 29, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 29: Britney Spears and Sam Asghari attend a basketball game between the Los Angeles Lakers and the Golden State Warriors at Staples Center on November 29, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LAS VEGAS, NV - NOVEMBER 04: Singer Britney Spears speaks during the grand opening of the Nevada Childhood Cancer Foundation Britney Spears Campus on November 4, 2017 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)
LAS VEGAS, NV - NOVEMBER 04: Singer Britney Spears (L) and talent manager Larry Rudolph listen to Clark County Commissioner Steve Sisolak's speech during the grand opening of the Nevada Childhood Cancer Foundation Britney Spears Campus on November 4, 2017 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)
DISNEY CHANNEL PRESENTS THE 2017 RADIO DISNEY MUSIC AWARDS - Entertainment's brightest young stars turned out for the 2017 Radio Disney Music Awards (RDMA), music's biggest event for families, at Microsoft Theater in Los Angeles on Saturday, April 29. 'Disney Channel Presents the 2017 Radio Disney Music Awards' airs Sunday, April 30 (7:00 p.m. EDT). (Image Group LA/Disney Channel via Getty Images) BRITNEY SPEARS, JAMIE LYNN SPEARS
DISNEY CHANNEL PRESENTS THE 2017 RADIO DISNEY MUSIC AWARDS - Entertainment's brightest young stars turned out for the 2017 Radio Disney Music Awards (RDMA), music's biggest event for families, at Microsoft Theater in Los Angeles on Saturday, April 29. 'Disney Channel Presents the 2017 Radio Disney Music Awards' airs Sunday, April 30 (7:00 p.m. EDT). (Image Group LA/Disney Channel via Getty Images) BRITNEY SPEARS
TAIPEI, CHINA - JUNE 13: American singer Britney Spears performs during her concert at TWTC Nangang Exhibition Hall on June 13, 2017 in Taipei, Taiwan of China. (Photo by VCG/VCG via Getty Images)
DISNEY CHANNEL PRESENTS THE 2017 RADIO DISNEY MUSIC AWARDS - Grammy Award-winning pop superstar Britney Spears was honored with the 2017 RDMA 'Icon' Award in recognition a career and music that has been loved by generations of Radio Disney fans. 'Disney Channel Presents the 2017 Radio Disney Music Awards' airs Sunday, April 30 (7:00 p.m. EDT). (Image Group LA/Disney Channel via Getty Images) BRITNEY SPEARS
BEVERLY HILLS, CA - MARCH 16: Singer Britney Spears attends Art Hearts Fashion LAFW Fall/Winter 2017 - Day 3 at The Beverly Hilton Hotel on March 16, 2017 in Beverly Hills, California. (Photo by Arun Nevader/Getty Images)
LOS ANGELES, CA - FEBRUARY 11: Britney Spears arrives at the Pre-GRAMMY Gala and Salute to Industry Icons Honoring Debra Lee on February 11, 2017 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
ORLANDO, FL - MARCH 13: (EDITORS NOTE: Image has been retouched.) Britney Spears enjoys a family outing with Jayden Federline, Maddie Aldridge and Sean Federline at Planet Hollywood Disney Springs on March 13, 2017 in Orlando, Florida. (Photo by Gerardo Mora/Getty Images for Planet Hollywood Observatory)
LOS ANGELES, CA - FEBRUARY 11: Britney Spears attends Pre-GRAMMY Gala and Salute to Industry Icons Honoring Debra Lee at The Beverly Hilton on February 11, 2017 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
SAN JOSE, CA - DECEMBER 03: Singer Britney Spears performs during the Now! 99.7 Triple Ho Show 7.0 at SAP Center on December 3, 2016 in San Jose, California. (Photo by C Flanigan/FilmMagic)
SAN JOSE, CA - DECEMBER 03: Singer Britney Spears performs during the Now! 99.7 Triple Ho Show 7.0 at SAP Center on December 3, 2016 in San Jose, California. (Photo by C Flanigan/FilmMagic)
LOS ANGELES, CA - DECEMBER 02: Britney Spears performs at 102.7 KIIS FM's Jingle Ball 2016 at Staples Center on December 2, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - DECEMBER 02: Britney Spears performs at 102.7 KIIS FM's Jingle Ball 2016 at Staples Center on December 2, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES , CA - DECEMBER 02: Britney Spears performs on stage during the 102.7 KIIS FM's Jingle Ball 2016 on December 02, 2016 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
LOS ANGELES, CA - DECEMBER 02: (L-R) KIIS FM Assistant Program Director/Music Director Beata Czechowski, recording artist Britney Spears, and radio personality Sisanie attend 102.7 KIIS FM's Jingle Ball 2016 presented by Capital One at Staples Center on December 2, 2016 in Los Angeles, California. (Photo by Jonathan Leibson/Getty Images for iHeartMedia)
LONDON, UNITED KINGDOM - SEPTEMBER 28: Britney Spears seen at BBC Radio One on September 28, 2016 in London, England. PHOTOGRAPH BY Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Barcroft Images / Barcroft Media via Getty Images)
LONDON, ENGLAND - SEPTEMBER 28: Britney Spears seen at BBC Radio One on September 28, 2016 in London, England. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - SEPTEMBER 27: Britney Spears performs during Apple Music Festival at The Roundhouse on September 27, 2016 in London, England. (Photo by Dave J Hogan/Dave J Hogan/Getty Images)
LAS VEGAS, NV - SEPTEMBER 24: Britney Spears performs onstage during the 2016 iHeartRadio Music Festival - night 2 held at T-Mobile Arena on September 24, 2016 in Las Vegas, Nevada. (Photo by Michael Tran/FilmMagic)
LAS VEGAS, NV - SEPTEMBER 24: Rapper G-Eazy (L) and singer Britney Spears perform at the 2016 iHeartRadio Music Festival at T-Mobile Arena on September 24, 2016 in Las Vegas, Nevada. (Photo by Ethan Miller/WireImage)
LAS VEGAS, NV - SEPTEMBER 24: Recording artist Britney Spears performs onstage at the 2016 iHeartRadio Music Festival at T-Mobile Arena on September 24, 2016 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
LAS VEGAS, NV - SEPTEMBER 01: Britney Spears performs her Piece Of Me show at the Axis Theatre Planet Hollywood Resort on September 06, 2016 in Las Vegas, Nevada. PHOTOGRAPH BY Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Barcroft Images / Barcroft Media via Getty Images)
LAS VEGAS, NV - SEPTEMBER 01: Britney Spears performs her Piece Of Me show at the Axis Theatre Planet Hollywood Resort on September 06, 2016 in Las Vegas, Nevada. PHOTOGRAPH BY Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Barcroft Images / Barcroft Media via Getty Images)
NEW YORK, NY - AUGUST 29: (EXCLUSIVE COVERAGE) Britney Spears Visits Music Choice on August 29, 2016 in New York City. (Photo by Kevin Mazur/Getty Images for Music Choice)
NEW YORK, NY - AUGUST 28: Rapper G-Eazy (L) and singer Britney Spears arrive at the 2016 MTV Video Music Awards at Madison Square Garden on August 28, 2016 in New York City. (Photo by Allen Berezovsky/WireImage)
NEW YORK, NY - AUGUST 28: Britney Spears and G-Eazy perform onstage during the 2016 MTV Video Music Awards at Madison Square Garden on August 28, 2016 in New York City. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK, NY - AUGUST 28: Recording artist Britney Spears attends the 2016 MTV Video Music Awards at Madison Square Garden on August 28, 2016 in New York City. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK, NY - AUGUST 28: Britney Spears performs onstage during the 2016 MTV Video Music Awards at Madison Square Garden on August 28, 2016 in New York City. (Photo by Jeff Kravitz/FilmMagic)
Singer Britney Spears arrives for the 2016 MTV Video Music Awards August 28, 2016 at Madison Square Garden in New York. / AFP / Angela Weiss (Photo credit should read ANGELA WEISS/AFP/Getty Images)
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"She misses a routine and wants to have one," the source said. "She will be touring places she hasn’t toured in years and loves to go visit, so that was also appealing to her."

Spears spoke to ET in July about keeping fit during her tour.

"This round of shows that we are doing on tour, they are back-to-back," she explained. "I don't have any time apart besides flying, so it's really just the show itself is going to keep me [in shape]. ... My show is a workout in itself. It keeps you really strong." 

The pop star also said her priority these days is simply "to be a happy person." 

"It's really important to spread joy," she said. "It's contagious. I think that's really sexy for women." 

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