'Camp Rock' Stars Demi Lovato and Alyson Stoner Went to Rehab as Teenagers -- but for Different(01)

'Camp Rock' Stars Demi Lovato and Alyson Stoner Went to Rehab as Teenagers -- but for Different(01)

Image gallery: Demi Lovato Alyson Stoner

Alyson Stoner 'Camp Rock' Stars Demi Lovato and Alyson Stoner Went to Rehab as Teenagers -- but for Different Demi Lovato apologizes to Alyson Stoner for letting fame get to her head between “Camp Rock” movies