‘Thick thighs save lives’: Demi Lovato brags about her toned legs in silver mini-dress as she hits up the iHeartRadio Music Awards Dressed in a form-fitting silver crop top and pencil skirt, complete with silver stilettos, silver biker jacket and a giant silver belt, the 24-year-old had a futuristic look about her. Her long brown hair and smokey eye makeup offset her bold look, which she accessorized simply with a silver ring and bangle.