Britney Behind the Scenes, Kellan X-Rated in Underwear, & Shirtless Rob! On the latest PopSugar Rush, watch Britney Spears groove to a Rihanna tune during her photo shoot for Candie's, hear Kellan Lutz's X-rated message while posing in his underwear, and check out Robert Pattinson's shirtless scenes in a new clip of Remember Me!