The "Work B**ch" singer shared a pic with her 4.8 million Instagram followers on Sunday that showcased her fit physique. Donning a yellow string bikini top, Spears has never looked happier posing next to her beau Charlie Ebersol, 32.
This past December, Spears shared some of her workout secrets to Women's Health. "I start with 20 minutes of intense cardio -- usually running -- move on to light free weights, body-weight exercises such as push-ups, squats and sit-ups, then finish it off with a stretch," she said, adding that dancing "is a great cardio workout."
Whatever she's doing, it's working!
See more of Britney's dating history:
Britney Spears & boyfriends through the years
Britney Spears flashes insane bikini body while hanging with her 'Louisiana Boy'!
UNITED STATES - SEPTEMBER 28: Britney Spears sits at a screening of 'Drive Me Crazy' at Union Square Theater with Robbie Carrico. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
LAS VEGAS - DECEMBER 08: Musician Britney Spears and husband Kevin Federline arrive at the 2004 Billboard Music Awards at the MGM Grand Garden Arena on December 8, 2004 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)
Britney Spears arrives with her boyfriend Adnan Ghalib (R) at the Los Angeles County Superior courthouse 14 January 2008 for a hearing regarding visitation rights for her two sons that she has with ex-husband Kevin Federline. AFP PHOTO/Gabriel BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)
Jason Trawick (L) and Britney Spears arrive at the 2011 MTV Video Music Awards (VMAs) August 28, 2011 at the Nokia Theatre in downtown Los Angeles, California. AFP PHOTO / Frederic J. Brown (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
LOS ANGELES, CA - SEPTEMBER 11: Singer Britney Spears (L) and fiance agent Jason Trawick appear at the premiere of Fox's 'The X Factor' Season 2 and handprint ceremony at the Chinese Theatre on September 11, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
WEST HOLLYWOOD, CA - MARCH 02: Recording artist Britney Spears (L) and David Lucado attend Neuro at the 22nd Annual Elton John AIDS Foundation Academy Awards Viewing Party at The City of West Hollywood Park on March 2, 2014 in West Hollywood, California. (Photo by Charley Gallay/Getty Images for Neuro)