Jordin Sparks Cheers on Boyfriend Jason Derulo at the Billboard Music Awards Rehearsals!

Jordin Sparks keeps it casual at the 2014 Billboard Music Awards Artist Appreciation Lounge at the MGM Grand Garden Arena on Saturday afternoon (May 17) in Las Vegas.

Tat same day, the 24-year-old singer rooted on her beau Jason Derulo who spent his day rehearsing.

PHOTOS: Check out the latest pics of Jordin Sparks

“Go baby! RT @OfficialBBMAs: SNEAK PEEK: @jasonderulo at rehearsals. #wigglewigglewiggle #bbmas,” Jordin tweeted.

Earlier this week, Jordin took the spotlight in a bright pink jumpsuit during the 2014 BMI Pop Awards held at the Regent Beverly Wilshire Hotel in Beverly Hills, Calif.