Demi Lovato Searches for ‘Substance’ and Finds Paris Hilton

Demi Lovato Explains the Meaning Behind 'Substance,' Reflects on Last Album: 'I Don't Know Who That Person Was'

Demi Lovato Explains Recent Facial Injury & Encounters With Aliens on ‘Kimmel’: Watch

Demi Lovato Gives Update on Facial Injury That Left Them Needing Stitches, Debuts Nostalgic 'Substance' Video