Katy Perry will spend her birthday with Hillary Clinton

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25 of Katy Perry's Best Style Moments

A version of this story first appeared in the Oct. 30 issue of The Hollywood Reporter magazine. To receive the magazine, click here to subscribe.

Katy Perry turns 31 on Oct. 25, and unlike her last birthday bash -- the singer capped off a weeklong fete with a party for more than 70 pals in Marrakech, Morocco -- she plans to go low-key this year.

"I've always done big parties, and I always love a themed birthday," Perry tells THR, noting that in 2012 she went with a vampire- and witch-themed party at L.A.'s Magic Castle ("We took over the whole place -- it was amazing!"). "But I went so cray last year, it's time to tone it down and not make it so much about me."

See photos of Katy Perry through the years:

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Katy Perry through the years
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Katy Perry will spend her birthday with Hillary Clinton
IMAGE DISTRIBUTED FOR STARKEY HEARING FOUNDATION - Katy Perry performs at the Starkey Hearing Foundation So The World May Hear Awards Gala in St. Paul, on Sunday, July, 26, 2015. (Andy King/AP Images for Starkey Hearing Foundation)
FLORENCE, ITALY - JUNE 18: Katy Perry poses backstage prior to the Moschino show during the 88 Pitti Uomo on June 18, 2015 in Florence, Italy. (Photo by Vittorio Zunino Celotto/Getty Images)
TANGERANG, INDONESIA - MAY 9: Katy Perry performs on the stage during her 'Prismatic' world tour concert at Indonesia Convention Extibition, Tangerang, Indonesia on May 9, 2015. This is the second concert Katy Perry in Indonesia. (Photo by Kharisma Aris/Anadolu Agency/Getty Images)
Katy Perry arrives at The Metropolitan Museum of Art's Costume Institute benefit gala celebrating "China: Through the Looking Glass" on Monday, May 4, 2015, in New York. (Photo by Charles Sykes/Invision/AP)
INDIO, CA - APRIL 12: Mia Moretti (2ndL) and Katy Perry (C) with guests in the VIP arena during the 2015 Coachella Valley Music and Arts Festival - Weekend 1 at The Empire Polo Club on April 12, 2015 in Indio, California. (Photo by Rachel Murray/Getty Images for Coachella)
LOS ANGELES, CA - MARCH 26: Singer Katy Perry takes a selfie with fans at the screening of EPIX's 'Katy Perry: The Prismatic World Tour' at The Theatre at Ace Hotel Downtown LA on March 26, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
US singer Katy Perry performs at the Ziggo Dome in Amsterdam, on March 09, 2015 as part of her Prismatic World Tour. AFP PHOTO/ANP/FERDY DAMMAN - netherlands out - (Photo credit should read Ferdy Damman/AFP/Getty Images)
PARIS, FRANCE - MARCH 08: (L-R) Kanye West, Kim Kardashian and Katy Perry attend the Givenchy show as part of the Paris Fashion Week Womenswear Fall/Winter 2015/2016 on March 8, 2015 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)
LOS ANGELES, CA - FEBRUARY 08: Singer Katy Perry attends The 57th Annual GRAMMY Awards at the STAPLES Center on February 8, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)
Katy Perry arrives at the World Premiere Of "Katy Perry: The Prismatic World Tour" held at The Theatre at Ace Hotel on Thursday, March 26, 2015, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
GLENDALE, AZ - FEBRUARY 01: Singer Katy Perry performs during the Pepsi Super Bowl XLIX Halftime Show at University of Phoenix Stadium on February 1, 2015 in Glendale, Arizona. (Photo by Tom Pennington/Getty Images)
GLENDALE, AZ - FEBRUARY 01: Recording artist Katy Perry performs onstage during the Pepsi Super Bowl XLIX Halftime Show at University of Phoenix Stadium on February 1, 2015 in Glendale, Arizona. (Photo by Christopher Polk/Getty Images)
PHOENIX, AZ - JANUARY 29: Singer Katy Perry speaks during the Pepsi Super Bowl XLIV Halftime Show Press Conference at the Phoenix Convention Center on January 29, 2015 in Phoenix, Arizona. (Photo by Mike Lawrie/Getty Images)
FILE - In this Sept. 16, 2014 file photo, Katy Perry performs on stage at "The Prismatic World Tour" at the Honda Center in Anaheim, Calif. (Photo by John Shearer/Invision/AP, File)
Katy Perry arrives at the MTV Video Music Awards at The Forum on Sunday, Aug. 24, 2014, in Inglewood, Calif. (Photo by Jordan Strauss/Invision/AP)
SYDNEY, AUSTRALIA - NOVEMBER 26: Katy Perry takes a selfie with fans at the 28th Annual ARIA Awards 2014 at the Star on November 26, 2014 in Sydney, Australia. (Photo by Ryan Pierse/Getty Images)
WASHINGTON, DC - JULY 31: (AFP OUT) Singer Katy Perry performs during a concert commemorating the Special Olympics with U.S. President Barack Obama, not pictured, in the State Dining Room of the White House on July 31, 2014 in Washington, D.C. Founded in 1968 by Eunice Kennedy Shriver, the Special Olympics movement has grown to more than 4.4 million athletes in 170 countries. (Photo by Andrew Harrer-Pool/Getty Images)
Pop star Katy Perry arrives on June 12, 2014 in Los Angeles, California, for an announcement where she is teaming up Staples to 'Make Roar Happen', celebrating and supporting teachers for a philanthropic effort during the back-to-school season. Besides donating $1 million to DonorsChoose.org, Staples will sponsor the North American leg of Katy Perrys Prismatic World Tour, which starts in Raleigh, North Carolina on June 22. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
LAKE BUENA VISTA, FL - JULY 04: In this handout photo provided by Disney Parks, singer Katy Perry poses with Minnie Mouse and Mickey Mouse at Disney's Hollywood Studios at Walt Disney World Resort on July 4, 2014 in Lake Buena Vista, Florida. Katy Perry, who sang the hit song 'Firework,' visited Walt Disney World Resort on U.S. Independence Day during a break in her global 'Prismatic' concert tour. (Photo by Chloe Rice/Disney Parks via Getty Images)
In this photo provided by Invision, Katy Perry poses for a photo at the Staples “Make Roar Happen” news conference Thursday, June 12, 2014, at Nokia Theatre in Los Angeles. (Photo by Matt Sayles/Invision for Staples/AP Images)
Katy Perry arrives at MOCA's 35th Anniversary Gala presented by Louis Vuitton at The Geffen Contemporary at MOCA on Saturday, March 29, 2014 in Los Angeles. (Photo by Annie I. Bang /Invision/AP)
LONDON, ENGLAND - FEBRUARY 18: Katy Perry attends the Elle Style Awards 2014 at one Embankment on February 18, 2014 in London, England. (Photo by Anthony Harvey/Getty Images)
LOS ANGELES, CA - JANUARY 27: Recording artist Katy Perry performs onstage during 'The Night That Changed America: A GRAMMY Salute To The Beatles' at the Los Angeles Convention Center on January 27, 2014 in Los Angeles, California. (Photo by Kevin Winter/Getty Images for NARAS)
NEW YORK - FEBRUARY 04: Singer Katy Perry attends the Betsey Johnson 2008 fashion show during Mercedes-Benz Fashion Week Fall 2008 at The Tent at Bryant Park on February 4, 2008 in New York City. (Photo by Stephen Lovekin/Getty Images for IMG)
CULVER CITY, CA - MAY 30: Singer Katy Perry performs onstage during the taping of Spike TV's 2nd Annual 'Guys Choice' Awards held at Sony Studios on May 30, 2008 in Culver City, California. The show airs on June 22, 2008 at 10PM ET/PT on Spike TV. (Photo by Alberto E. Rodriguez/Getty Images)
LOS ANGELES, CA - JUNE 17: Musician Katy Perry attends the Katy Perry record release party for 'One of the Boys' at Capitol Records on June 17, 2008 in Los Angeles, California. (Photo by Jesse Grant/Getty Images for EMI Music)
NEW YORK - SEPTEMBER 05: Katy Perry arrives in Bryant Park during the Mercedes-Benz Fashion Week Spring 2008 on September 5, 2007 in New York City. (Photo by Katy Winn/Getty Images for IMG)
LOS ANGELES - MAY 5: Singer Katy Perry arrives at the H.D. Buttercup Grand Opening Celebrity Treasure Hunt at the H.D. Buttercup at the Helms Bakery Building May 5, 2005 in Los Angeles, California. (Photo by Phil McCarten/Getty Images)
WEST HOLLYWOOD, CA - FEBRUARY 27: Singer Katy Perry arrives at The Abbey / Esquire Magazine 'The Envelope Please' Oscar Viewing Party on February 27, 2005 at The Abbey in West Hollywood, California. (Photo by Amanda Edwards/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 23: Singer Katy Perry during the Jimmy Choo annual Oscar Collection Preview and Tea at the Peninsula Hotel on February 23, 2004 in Beverly Hills, California. (Photo by Amanda Edwards/Getty Images)
SAO PAULO, BRAZIL - SEPTEMBER 24: Singer Katy Perry performs live at Arena Allianz Parque on September 25, 2015 in Sao Paulo, Brazil. (Photo by Daniel Vorley/Getty Images)
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Read More: Katy Perry to Rally Hillary Clinton Supporters in Iowa

In fact, she's making her birthday weekend about Hillary Clinton: Perry will appear at the Democratic Party's Jefferson-Jackson Dinner in Des Moines, Iowa, for the presidential candidate. She won't be the only notable name at the event. Clinton's husband, former President Bill Clinton, will also be in attendance.

Perry tweeted about the event on Oct. 19, posting that she's "proud to stand" with the presidential nominee.

On Thursday, in the midst of testifying at the Benghazi committee, Clinton was captured on camera greeting an unidentified man and asking, "Are you gonna come to my Katy Perry concert?" He replied, "I hope so," to which Clinton said, "I hope so, too."

The singer tweeted a support message for the Democratic hopeful late Thursday evening after the hearing had finished: "Glad the witch hunt is coming to an end and we can refocus on the future of [America]. I admire your unbreakable strength @HillaryClinton #youaboss."

Read More: Hillary Clinton Plugs Katy Perry Concert During Benghazi Hearing

Also see photos of Hillary Clinton during the Benghazi hearing:

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Hillary Clinton testifies on Benghazi 10/21
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Katy Perry will spend her birthday with Hillary Clinton
Democratic presidential candidate, former Secretary of State Hillary Rodham Clinton arrives on Capitol Hill in Washington, Thursday, Oct. 22, 2015, to testify before the House Benghazi Committee. After months of buildup, Hillary Rodham Clinton finally takes center stage as the star witness in the Republican-led investigation into the deadly 2012 attacks in Benghazi, Libya. (AP Photo/Jacquelyn Martin)
Former Secretary of State and Democratic Presidential hopeful Hillary Clinton waits to testify before the House Select Committee on Benghazi on Capitol Hill in Washington, DC, October 22, 2015. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic presidential candidate, former Secretary of State Hillary Rodham Clinton, left, walks past members of the media as she arrives on Capitol Hill in Washington, Thursday, Oct. 22, 2015, to testify before the House Benghazi Committee. (AP Photo/Jacquelyn Martin)
Democratic presidential candidate and former Secretary of State Hillary Rodham Clinton, arrives to testify on Capitol Hill in Washington, Thursday, Oct. 22, 2015, before the House Select Committee on Banghazi. After months of buildup, Hillary Rodham Clinton finally takes center stage as the star witness in the Republican-led investigation into the deadly 2012 attacks in Benghazi, Libya. (AP Photo/Manuel Balce Ceneta)
Former Secretary of State and Democratic Presidential hopeful Hillary Clinton arrives to testify before the House Select Committee on Benghazi on Capitol Hill in Washington, DC, October 22, 2015. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
WASHINGTON, DC - OCTOBER 22: Democratic presidential candidate and former Secretary of State Hillary Clinton takes her seat prior to testifying before the House Select Committee on Benghazi October 22, 2015 on Capitol Hill in Washington, DC. The committee held a hearing to continue its investigation on the attack that killed Ambassador Chris Stevens and three other Americans at the diplomatic compound in Benghazi, Libya, on the evening of September 11, 2012. (Photo by Chip Somodevilla/Getty Images)
Former Secretary of State and Democratic Presidential hopeful Hillary Clinton waits to testify before the House Select Committee on Benghazi on Capitol Hill in Washington, DC, October 22, 2015. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic presidential candidate, former Secretary of State Hillary Rodham Clinton looks toward the dais as she settles into her seat on Capitol Hill in Washington, Thursday, Oct. 22, 2015, prior to testifying before the House Benghazi Committee. (AP Photo/Evan Vucci)
Former Secretary of State and Democratic Presidential hopeful Hillary Clinton arrives to testify before the House Select Committee on Benghazi on Capitol Hill in Washington, DC, October 22, 2015. AFP PHOTO/JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Democratic presidential candidate, former Secretary of State Hillary Rodham Clinton takes her seat on Capitol Hill in Washington, Thursday, Oct. 22, 2015, prior to testifying before the House Benghazi Committee. (AP Photo/Evan Vucci)
Hillary Clinton, former U.S. secretary of state and 2016 Democratic presidential candidate, speaks during a House Select Committee on Benghazi hearing in Washington, D.C., U.S., on Thursday, Oct. 22, 2015. Clinton said that she accepted responsibility for a lethal 2012 attack on the U.S. diplomatic mission in Benghazi, Libya and that she sought afterward to improve security for State Department workers abroad, as the House Benghazi panel investigating the incident began a hearing that may prove a turning point for her presidential campaign. Photographer: Pete Marovich/Bloomberg via Getty Images
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