New York's Metropolitan Museum of Art Costume Institute Gala is arguably the most celebrated night of style where top designers, heavy-hitting Hollywood types, and the most supreme supermodels (and superstars) converge to honor couture fashion.

Photo Gallery: View photos from the 2009 Costume Institute Gala-Arrivals

And this year's event lived up to that billing, as stars such as Rihanna, Eva Mendes,  Madonna, Victoria Beckham, Kate Hudson, Rachel Weisz, Jessica Biel and Liv Tyler were on hand for the fashionably fabulous affair. Monday marked the museum's opening of "The Model as Muse: Embodying Fashion," an exhibition which explores 50 years of iconic designs through the women whose faces, figures and attitudes shaped and personified them.

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Madonna's had a lot on her mind lately and maybe it's impacting her fashion sense.

Taking a break from her attempts to adopt a 4-year-old Malawi orphan, the singer took some fashion risks on the red carpet of New York's Metropolitan Museum of Art Costume Institute Gala event Monday night, and they didn't pan out for the better.

PHOTO GALLERY:  Madonna's More Interesting Looks

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