Miley Cyrus In Markus Lupfer - 2013 American Music Awards

After surprising us all with a demure Versus Versace white suit on the red carpet, Miley Cyrus changed into something more, well, Miley-esque for her performance at the 2013 American Music Awards held at the Nokia Theatre L.A. Live on Sunday in Los Angeles.

Having just turned 21 this weekend, the singer hit the stage for a performance of her smash hit ‘Wrecking Ball’ wearing a custom Markus Lupfer ‘meow’ top and high-waisted panties featuring a cat print, which she styled with matching platform shoes, PVC oversized earrings and bracelets.

As much as she may believe, there is nothing sexy or appealing about this look.

The bigger question is when did it become mandatory for celebs to perform in their underwear?

Credit: Getty