Alessandra Ambrosio

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.

"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.

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."

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!"