She split up with boyfriend of six years Wilmer Valderrama earlier this summer. But Demi Lovato proved the show must go on as she took to the stage in a sheer lace bodysuit and fishnet tights to perform at Bridgestone Arena in Nashville, Tennessee, on Wednesday night. The singer-songwriter, 24, looked every inch the pop princess in the form-fitting costume, cinched in at the waist with a laser-cut statement belt.