Demi Lovato apologizes to Alyson Stoner for letting fame get to her head between “Camp Rock” movies(02)

Demi Lovato apologizes to Alyson Stoner for letting fame get to her head between “Camp Rock” movies(02)

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