Christina Aguilera's Best and Worst Looks on 'The Voice'

Aguilera actually came onstage wearing a cowboy hat and vest -- a nod to fellow mentor Blake Shelton. She sang his song "Hillbilly Bone" and tossed a wad of cash at him before shedding the hat and launching into a rendition of her own hit "Fighter." The pop star's barely-there outfit is just one of many eye-catching get-ups we've seen her sport on the NBC reality series. Here are a few others...

Aguilera actually came onstage wearing a cowboy hat and vest -- a nod to fellow mentor Blake Shelton. She sang his song "Hillbilly Bone" and tossed a wad of cash at him before shedding the hat and launching into a rendition of her own hit "Fighter." The pop star's barely-there outfit is just one of many eye-catching get-ups we've seen her sport on the NBC reality series. Here are a few others...