The School of Rock star admits he's upset by the fact he is now the heavyweight in the band following Gass' recent weightloss.

Black says, "He's, like, 225 pounds right now, and I'm, like, 235 pounds right now. It drives me insane when that happens, and so I decided to just lose a bunch of weight."

Black admits he has turned to drugs to help him shed the extra pounds after realising exercise and healthy food wasn't enough: "The problem is that I'm always super-hungry for macaroni and cheese and also cheeseburgers, and there's nothing I can do to stop myself.

"I started a regimen of drugs that prevent me from eating, supposedly. I just started the drugs and they're not working, so I'm gonna up the dosage... The side effects, supposedly, is it (drug) sucks out your personality, and then you're just a zombie."