There's a new sheriff in Justin Bieber-ville now, and her name's Selena Gomez! We found out she's officially taken him back, but she's demanding he clean up his act. Can she put him on the straight and narrow? Plus, Lamar Odom loses his temper on a photographer after being asked about cheating rumors -- then calmly snaps a photo with fan. We talk to the fan -- who says Lamar was cool as a cucumber the whole time. And, Jay-Z hates Robert De Niro ... is the something about Bob that we don't know?