Nick Jonas' Girlfriend Olivia Culpo Wore the Most Cleavage-Baring Dress We've Ever Seen

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Miss Columbia, Paulina Vega
, may have won the 63rd Annual Miss Universe Pageant on Sunday night, but Nick Jonas' 22-year-old girlfriend Olivia Culpo had jaws dropping when she showed up with her sexy white gown.

Culpo -- who won Miss Universe in 2012 -- showed up to support her man, who was performing at the pageant held in Miami, Fla. Thankfully, she didn't suffer a wardrobe malfunction though her white dress bared a LOT of leg and even more cleavage.

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Jonas, 22, seemed to be a fan of his girlfriend's getup as he called her out during his Miss Universe performance. "Best part of tonight," Culpo Instagrammed, "being serenaded by this stud #MissUniverse2015 @nickjonas [sic]."

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He and Culpo have been dating since the summer of 2013. 

What do you think of Culpo's sexy style? Play fashion critic in the comments and tweet #ETnow.

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