Britney Spears steamed up the stage with Rihanna, and later Nicki Minaj, at last night's Billboard Awards in Las Vegas. In her seat and backstage, however, it was boyfriend Jason Trawick who was right by her side. The couple cozied up in the audience during an evening of focusing on Britney's career, though Jason recently left her talent agency, William Morris Endeavor. He's now planning to join another firm called Famos, which has backing from the likes of Mick Jagger. Their personal relationship continues regardless, and Jason was there to support Britney despite her not having any nominations this year.