PopSugar — Zac Efron stepped into HBO Hollywood, filming a guest starring spot for the next season of Entourage in LA yesterday. Between takes, he and Jeremy Piven happily posed with a young female fan. Zac is just one of many cameos - from Tom Brady to Lil Way... more info

MTV.com News — '17 Again' will play himself on an upcoming episode.By Jocelyn Vena Zac Efron Photo: Kevin Winter/ Getty Images Zac Efron will join the illustrious ranks of celebrities who've had cameos on "Entourage" when he makes an appearance this seas... more info

MTV.com News — Band's CobraCam has turned messing around online into an art form, in Bigger Than the Sound. By James Montgomery Cobra Starship's Nate Novarro Photo: cobracam.tv For nine weeks now, I've been meaning to write this column, but I kept gettin... more info

VH1 News — Lil Wayne protégé Drake talked about working with Rihanna on her new LP, and again denied that he and she are a couple. more info

Recent headlines about the end of Mel Gibson's marriage and his relationship with 39-year-old Russian musician Oksana Grigorieva ” who is pregnant with his child ” have inevitably raised questions about how the devout star's faith w... more info

Buzzgrinder — Everything I learned about how to be a good rapper I learned from the song "Dr. Carter" by Lil' Wayne. And when I listen to Alexipharmic, that whole issue of "weak flow" Weezy talked about comes to mind. Alexipharmic is probably a legit dude, based ... more info

AngryApe — For their T-Wayne collaboration more info

MTV.com News — The MCs perform 'Renegade' together at Los Angeles celebration of the new video game.By Yasmine Richard Eminem and Jay-Z perform at the "DJ Hero" launch party on Monday Photo: Kristian Dowling/ Getty Images LOS ANGELES — If you want to b... more info

MTV.com News — Jermaine Dupri assembles Usher, Nelly and others for Ocean's 7 mixtape and possible film, in Mixtape Daily. By Shaheem Reid, with additional reporting by Rahman Dukes R. Kelly Photo: Jive The fellas know we're repping for them, and the lad... more info

VH1 News — R. Kelly remixed Lil Wayne, The-Dream and Drake for his first mixtape. Plus: Jermaine Dupri assembled Usher, Nelly and others for an Ocean's 7 mixtape and possible film, in Mixtape Daily. more info