Britney Spears Whips Her Hair Back and Forth

Britney Spears and her boyfriend, Hollywood agent Jason Trawick, get in a good work-out on Saturday (October 30) at a gym in Beverly Hills, Calif.

The 28-year-old pop princess is a big fan of Willow Smith‘s infectious new song, “Whip My Hair.”

Britney tweeted, “Have you guys seen Will Smith‘s daughter @OfficialWillow’s video? SOOOO CUTE!!!!”

We agree. Adorable!!!

FYI: Jason is wearing a No Excess Black Mock Cardigan.

10+ pictures inside of Britney Spears and Jason Trawick hitting the gym…