Demi Lovato Performs '29' & 'Substance' During 'The Tonight Show' Take Over - Watch!

Demi Lovato took over The Tonight Show with host Jimmy Fallon this week. The 29-year-old musician’s appearances all lead up to the release of her brand new album, Holy Fvck. During her week long stops on the studio stage, Demi co-hosted the show next to Jimmy, and also gave two performances of her most-talked about [...]