Answer: It's Demi Lovato from her 'Remember December' video! The 'X Factor' judge, who was 18 at the time  of the shoot, is looking very rock star in her leather, studded gloves and black jacket. We also love that sparkly hooded dress Demi wears, which Lindsay Lohan totally ripped off at the 2010 Golden Globes.

Watch the Demi Lovato 'Remember December' Video