Demi Lovato debuts new rock song Skin Of My Teeth with live performance on NBC talk show

Demi Lovato cuts edgy figure in Carrie pants as they celebrate release of Skin Of My Teeth in NYC

Demi Lovato soaks in bath tub in tank top before rocking out in leather for Skin of My Teeth video

Demi Lovato Goes Grunge in the New Music Video for 'Skin of My Teeth' - Watch Here