Teen pop tart Miley Cyrus spent so much time getting her new hair 'do cut and blown out ... that she forgot to wear a bra and pants under her white blazer dress thing at the Billboard Music Awards in Las Vegas last night.
The 19-year-old's low-cut jacket showed off a new side of Miley.
Pantless on the Red Carpet
5/21/2012 7:00 AM PDT BY Johnny Lopez
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