Why is Britney so happy? Cos we shot J.R!

Britney Spears is all smiles after spending a looooooong day in the studio with her former (current?) hookup, music producer J.R. Rotem. Britney was all giggles as she drove her car full of girlfriends out of the studio parking lot minutes after swarthy J.R. sped off in his $180,000 Lamborghini Gallardo. "Baby, you can drive MY car", as the song goes...