Soon after news broke that the High School Musical star recently completed a stint in rehab, possibly for alcohol abuse, TMZ did a little digging and now claims Zac had a "big" coke addiction. His problem supposedly spiraled out of control while he was filming Seth Rogen's movie Neighbors in April. A source says, "It was common knowledge he was struggling with cocaine."
The gossip blog say Zac hit bottom when he and some friends "went on a coke rager in a room at the SkyLofts at the MGM Grand in Vegas...and caused around $50k in damage."
Meanwhile, an insider tells E! News that Zac is now "healthy, happy and not drinking. He's taking time to focus on working."