Kelly Rowland
turned heads at last night's premiere party for "The X Factor" ... or should we say "XXX Factor"!

The former Destiny's Child singer flaunted her surgically enhanced chest in a low-cut crop top. She's a new addition to the singing competition's judging panel, joining Simon Cowell, Demi Lovato, and fellow newcomer Paulina Rubio.

"It's something I really wanted to do for myself," Kelly told British Cosmopolitan in 2007 about her boob job. "Not for a man, not for work, for myself. And I love them!"

Kelly wasn't the only one flaunting cleavage on Thursday. Simon put his pecs on display in a shirt that was more than half unbuttoned.

Will the new judging panel get you psyched for "The X Factor"? Season 3 premieres next Wednesday.

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