Fashion Rocks, the weird annual live-music-and-designer-clothes charity fundraiser, aired on CBS last night and singing delinquent Justin Bieber made a "surprise" appearance to introduce Rita Ora with model Lara Stone. He was welcomed to the stage with loud booing. In an apparent, ill-conceived bit, he strips down to his underwear, which incites additional booing but also the piercing sound of screams, possibly of arousal. Watching Justin Bieber getting undressed on stage in front of a model is the longest 20 seconds of anyone's life.