We see London, we see France, we see Alessandra Ambrosio's underpants!

When the Brazilian supermodel hit up the Heineken and Min-sponsored Warner Music Grammy party at Chateau Marmont in West Hollywood Feb. 10, the 31-year-old donned a sheer Alexandre Vauthier Couture dress that exposed her underwear. The sexy look, which featured a thigh-high slit and plunging neckline, was paired with Kimberly McDonald jewelry, Giuseppe Zanotti heels and a Christian Louboutin clutch.

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"Leather jackets are always fun," Ambrosio told Us Weekly. "I love the dresses that have a little transparency, like a nice slit."

Ambrosio also thanked Jennifer Mazur "for the amazing styling" via Twitter. The Victoria's Secret Angel also shared a video of Santigold performing via her Path account.

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The brunette beauty -- mom to daughter Anja, 4, and son Noah, 10 months, -- also revealed how she maintains her perfect physique. "I try to live life as if it's a vacation, I guess. I try to eat healthy. I always go to street fairs and get fresh fruits and vegetables," Ambrosio said. "I love going to yoga, I do Pilates Platinum and I love going to Soul Cycle."

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The 5-foot-10 star also also gave Us an update on her little ones with her fiance of four years, Jamie Mazur.  "Noah's started crawling and Anja's preparing to go to kindergarten!"

This article originally appeared on Usmagazine.com: Alessandra Ambrosio Flashes Underwear in Sheer Dress at Grammys Party