Britney Spears wears her underwear to the Billboard Awards

Britney Spears put on underwear but forgot any semblance of outerwear at Sunday’s Billboard Music Awards.

The 34-year-old, who is set to perform later in the evening, showed up on the red carpet in a black bra and a skimpy pair of briefs covered only by a thin layer of see-through material.

A lacy black train covered her behind — somewhat.

She finished off the look with over-the-knee fishnets.