Montag, 22, wore tight sequined pants and a matching bra, which exposed most of her cleavage, as she sang her new song Body Language, and did a few sexy body rolls and dance moves.
According to a source at the event, the worse Montag performed, the better the attention she will be getting.
'Everyone is going to talk about Heidi's performance and the worse she is the more talk there will be,' Fox News quoted the source as saying.
Image: Heidi Montag | Photograph: Lucas Jackson/Reuters