Taylor Swift and Alicia Keys courted wardrobe malfunctions (of the nip slip sort) at the 2013 40 Principales Awards in Madrid, Spain. Both divas wore boob-baring bodices at last night's (Jan. 24) event.

Swift was a vision in a white Kaufman Franco mini that showed off her legs and her cleavage, which has been the source of much speculation lately, with reports suggesting she upgraded her cup size via surgical means. Look at how that fabric hugs those two perfect mounds on her chest.

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That dangerously low cut neckline and top, which looked like two panels that covered her girls thanks to the miracle of double-stick tape, was an accident waiting to happen.

Carlos Alvarez, Getty Images

But she still looked amazeballs, especially those stems. The Christian Louboutin heels are extra-sexy, too. Check out the red sole as she strikes a catwalk pose. Another winning red carpet look for Tay Tay. She's given up those pearls and cardigans for sexy minis. Yay! Finally. She's making effective use of her model's height.

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Keys also dared to bare in a sheer top black dress that showed off her boobies a bit. It was less risque than Swift's choice. Now that's something you don't hear everyday -- T. Swizzle being sexier or more of a fashion risk taker than another pop diva. She's usually safe and classic with her choices! But back to Keys! This dress certainly showed off her girls and on her birthday eve, no less.

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We loved the strappy heels, too. This girl (on fire) has a bangin' bod.

Carlos Alvarez, Getty Images

Oh, French DJ David Guetta was there too, looking like he yanked himself away from a DJ gig to say "Wassup!" That means he didn't dress up.

Carlos Alvarez, Getty Images

Watch the Taylor Swift 'We Are Never Ever Getting Back Together' Video