Britney Spears shows off toned body in skimpy new outfit for her Vegas show

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Britney Spears is rocking her new costume!

The 35-year-old singer took to Instagram on Friday to unveil a sexy new outfit from her show at the AXIS at Planet Hollywood in Las Vegas, showing off her killer bod.

WATCH: Britney Spears Shares Spicy Snap of Rumored Beau Sam Asghari Shirtless

"New outfit, classic song 💫 See you tonight!! #PieceOfMe," she captioned the video.

New outfit, classic song 💫 See you tonight!! #PieceOfMe

A post shared by Britney Spears (@britneyspears) on

WATCH: Britney Spears Says She's 'Feeling Good About 2017,' Shares Midnight Kiss With Rumored Boyfriend

When Brit Brit's not slaying onstage, she's spending time with her rumored new boyfriend, Sam Asghari.

The singer opened up about the fitness model for the first time during a radio interview on CBS Radio's Fast in the Morning With Nathan Fast on AMP 103.7 Dallas on Thursday.

35 PHOTOS
Britney Spears' sexiest Instagrams of 2016
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Britney Spears' sexiest Instagrams of 2016
So ready for this night ✨💃🏼#VMAs
It's been a while since I've cut loose 😂😜
Kinda bored today and wanted to see if I could still do a leap... It's not perfect but not too shabby either 😂😂😂
Tonight was unforgettable 💫 Thank you #VMAs and thank you to my amazing fans!
Old school #tbt
#DoYouWannaComeOver… Coming 8/18
Nothing like hiking to refocus your energy. Can't wait to get back to Vegas this week!
So many more things on the way... #Glory is coming soon. Pre-order now!
Still dreaming a mile a minute... 💙
Another great day!
After Cheesecake Factory you do this... Treadmill and weights 💪
Hurricane Harbor whoop whoop!
Back in braids... See you at the show tonight! #PieceOfMe
I love handstands!
Twirling for all the haters
My head is melting it's so hot in Vegas!!
Wow Larry! Very impressed.
Day one: ✔️
Just chillaxing 🕶
Love boutiques... Just saying 😊
Bought three new swimsuits today 👙 This one is my favorite!
Getting crafty with the green paint lol... Hope you all have a wonderful, brilliant, blessed day! 💚
Happy Monday everyone! ❤️
The paps actually got a cool pic of me 🎀🎀🎀🎀
👙🌴☀️
Good afternoon!
Just chilling ☀️
Happy Friday! ☀️
Girls just wanna have fun 😉 Never released a video for this song... so decided to do a little tease on Instagram instead… enjoy!!
Yoga yoga...feelin better and getting back on the mat!!
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"It wasn't even a serious thing," Spears said of how she met Asghari while filming her music video for "Slumber Party." "It was one of those things that we were having a conversation to get through the experience, you know?"

"I kept his number, and it was so weird -- it was like five months later, and I found his number in my bag. I was like, 'He is really cute. This guy is really cute.' So then I called him, and ever since then, he is just a really fun, funny person," she added.

WATCH: Britney Spears Snapped in Bed With Rumored Boyfriend, Proves She's Alive & Well After Sony Hack

See more in the video above.

RELATED: Remember when Britney Spears dated Justin Timberlake?

22 PHOTOS
Britney Spears and Justin Timberlake together
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Britney Spears and Justin Timberlake together
(NO TABLOIDS) Britney Spears and Justin Timberlake during The 2000 MTV Video Music Awards at the Radio City Music Hall in New York, NY. (Photo by Kevin Mazur/WireImage)
Chris Kirkpatrick, Justin Timberlake, Britney Spears and Joey Fatone (Photo by Jeff Kravitz/FilmMagic)
383913 01: Pop singer Britney Spears and Justin Timberlake of ''N SYNC leave the Newsroom restaurant after having lunch together January 4, 2001 in Beverly Hills, CA. (Photo by Jason Kirk/Online USA)
Britney Spears & Justin Timberlake of NSYNC at the Shrine Auditorium in Los Angeles, CA (Photo by Jeffrey Mayer/WireImage)
Justin Timberlake, Britney Spears and Chris Kirkpatrick (Photo by Jeff Kravitz/FilmMagic, Inc)
Britney Spears and Justin Timberlake (Photo by Ron Galella/WireImage)
UNITED STATES - JULY 01: Photo of Britney SPEARS and Justin TIMBERLAKE; with Justin Timberlake from N'Sync (Photo by Christina Radish/Redferns)
Singer Britney Spears (L) and her boyfriend, Justin Timberlake of 'N Sync, warm up prior to the celebrity basketball game at the pop band's 'Challenge for the Children III' charity event at the Thomas & Mack Center July 29, 2001 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
Britney Spears and Justin Timberlake (Photo by Jeff Kravitz/FilmMagic)
396961 02: (ITALY OUT) Singer Britney Spears and her boyfriend Justin Timberlake attend the Britney Spears and Jive Records Release Party for Britney's new album 'Britney' November 6, 2001 in New York City. (Photo by Arnaldo Magnani/Getty Images)
UNITED STATES - JANUARY 01: Photo of Britney SPEARS; with Justin Timberlake (Photo by Christina Radish/Redferns)
UNITED STATES - CIRCA 2002: Hostess Britney Spears and host Justin Timberlake at SuperBowl Party at Planet Hollywood to raise funds for their charities. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
Britney Spears and Justin Timberlake during Justin Timberlake and Britney Spears Host 'Saturday Night Live' - After Party - February 2, 2002 at New York City in New York, NY, United States. (Photo by Ron Galella/WireImage)
400521 01: Britney Spears and Justin Timberlake arrive to host a Super Bowl XXXVI fundraiser February 3, 2002 at Planet Hollywood in New York City. Britney and Justin will unveil personally designed T-Shirts to be sold at Planet Hollywood with the proceeds benefiting their favorite charities. (Photo by Diane L. Cohen/Getty Images)
(NO TABLOIDS) Justin Timberlake & Britney Spears during Super Bowl XXXVI - Britney Spears & Justin Timberlake Host Super Bowl Fundraiser at Planet Hollywood Times Square at the Planet Hollywood Times Square in New York City, NY. (Photo by Denise Trusc
10 Feb. 2002: Britney Spears and Justin Timberlake watch the 2002 NBA All Star Game at the First Union Center in Philadelphia, PA. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this Photograph, User is consentingto the terms and conditions of the Getty Images License Agreement. Mandatory copyright notice and Credit: Copyright 2002 NBAE Photo By: Andy Hayt/NBAE/Getty Images
Justin Timberlake and Britney Spears at the 'NBA All-Star Game' at the First Union Center in Philadelphia, Pa. 2/10/02 Photo by Scott Gries/NBAE/ImageDirect
PHILADELPHIA, PA - FEBRUARY 10: Pop superstars Britney Spears (R) and boyfriend Justin Timberlake (L) talk as they sit courtside at the NBA All-Star Game 10 February 2002 in Philadelphia. (Photo credit should read TOM MIHALEK/AFP/Getty Images)
Britney Spears and boyfriend Justin Timberlake arrive at the premiere of her movie 'Crossroads' at the Mann Chinese Theatre in Hollywood, Ca., Feb. 11, 2002. (photo by Kevin Winter/Getty Images)
Justin Timberlake and Britney Spears (Photo by Denise Truscello/WireImage)
Justin Timberlake and Britney Spears at the Beverly Hills Hotel in Beverly Hills, California (Photo by Lester Cohen/WireImage)
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