Christina Aguilera's Sexy Light-Up Costume At MTV Awards (PHOTOS, VIDEO)

Her singles are tanking and she's postponed her tour, but Christina Aguilera was nonetheless one of the night's big performers at the MTV Movie Awards Sunday night.

In addition to some raunchy dance moves, Aguilera wore a costume with a LED heart at the crotch that blinked at the end of her performance.

Watch the video or scroll for pics.