Alyson Stoner - who played Caitlyn alongside Lovato's Mitchie ... me, it was." Looking back at her Disney Channel days, Lovato made it clear that she doesn't want to excuse past behavior anymore ...

She's only 15, but Demi ... Mitchie Torres. Read on to find out what goes on in the up-and-coming star's head – the answer might surprise you! And check out Camp Rock this June 20th. Tell me ...