Who Knew That Zac Efron Was in Rehab for Cocaine Habit?!?!

According to TMZ

Zac Efron did NOT go to rehab for alcohol abuse — it was far more serious, because multiple sources tell TMZ he had a serious yayo addiction.

Zac completed his stint in rehab earlier this year. We’re told the problem spiraled out of control during the filming of Seth Rogen’s movie “Neighbors,” which was shot during a narrow time frame beginning in April.

Sources tell us Zac — who also starred in the movie — was a no-show on a number of days. As one source connected with the film tells us, “It was common knowledge he was struggling with blow.”

Three other sources confirm … Zac’s problem was rooted in the white stuff, but say he also dabbled in Molly.

We’re told … early this year, Zac and some friends went on a snow-fueled rager in a room at the SkyLofts at the MGM Grand in Vegas … and caused around $50k in damage. No word on who took care of the bill.

We contacted Zac’s rep … but she didn’t respond.

Ummmm wtf is happening to all of the Disney stars?