Britney Spears' Billboard Music Awards 2016 Performance Video - WATCH NOW!

Britney Spears looks red hot in a bikini while performing on stage at the 2016 Billboard Music Awards held at the T-Mobile Arena on Sunday (May 22) in Las Vegas.

The 34-year-old entertainer opened the show by performing a medley of some of her greatest hits – “Work Bitch,” “Womanizer,” “I Love Rock N’ Roll,” “Breathe On Me,” “I’m a Slave 4 U,” “Touch of My Hand,” and “Toxic.”

PHOTOS: Check out the latest pics of Britney Spears

Earlier in the night, Britney decided not to wear pants on the red carpet and flashed her underwear in her sexy outfit!

20+ pictures inside of Britney Spears opening the show…