Meghan Trainor performed on the season finale of NBC’s “The Voice” last night wearing an Alice + Olivia Foss Cut-Out Back Dress ($358.20) over a black turtleneck, Alice + Olivia Argyle Semisheer Tights by Pretty Polly ($48.00), Alice + Olivia Urmila Platform Booties ($395.00, sold out), a jewel-encrusted Melody Ehsani I Drop Gems Mouth Ring ($48.00), a Delfina Delettrez Lips Piercing Ring (€395.00) and matching Delfina Delettrez Lips Piercing Earrings (€385.00), a gold chain Melody Ehsani Rolee Cuff Bracelet ($57.00), and a cartoon-style Musubi Miracle Lips Brooch ($75.00, sold out).