For an awards show aimed at the under-18 set, Demi Lovato's sartorial choices seemed a little too mature -- especially since her left nipple made an unexpected appearance on the pink carpet.

The singer co-hosted the Teen Choice Awards with "Glee" star Kevin McHale on Sunday night, but her feathered minidress showed perhaps a bit more skin than she intended.

The 19-year-old joined the growing list of celebrities embracing the ever-popular sideboob trend, but the mesh side-paneling on her Falguni and Shane Peacock dress didn't quite cover enough.

Luckily, the "X Factor" judge didn't endure the wardrobe malfunction for long, as she had a number of outfit changes for her hosting duties throughout the night.

PHOTO:
demi lovato nipple slip
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