The Hurt Locker may have dominated at the actual awards but who took the top prize on the red carpet? Take a look at our gallery of all the best (and worst) fashion moments and then leave a comment below to let us know who you think deserves the sartorial statue.
Oscars 2010: Best and worst dressed
First time attendee and nominee Carey Mulligan went for another asymmetrical gown, sporting this black Prada number which was decorated by tiny scissors, knives and forks.
Always elegant Helen Mirren wore a sheer-sleeved crystal-embellished Badgley Mischka gown.
Maggie Gyllenhaal wore a strapless Dries Van Noten draped evening dress, hand painted in bright blue brush strokes. We're not surprised -- the offbeat actress is pretty artsy, both on-screen and off.
The Oscars veteran wore all-white Chris March, which featured a deep draped V-neck that showed a little skin without looking too exposed.
Mariah Carey wore a high slit royal blue dress by Valentino and a pair of Chopard's rose cut diamond hoop earrings -- a whopping 43 carats!
J. Lo wore a strapless, shimmery pink dress by Armani Prive (the dressed we'd tipped for Maggie Gyllenhaal), along with Cartier diamond earrings, a platinum and diamond bracelet, and a white gold and diamond ring, collectively worth $284,450. The dress is gorge, but we can't help but ask, what's going on with her frizzy hair?
The best actress winner has had some hits and misses in the past, but Bullock played it safe in this gold Marchesa gown.
Attending as a presenter, Kate Winslet kept it simple in a silvery strapless Yves Saint Laurent gown.
Sidibe couldn't stop gushing about her off-shoulder grape-blue Marchesa dress to Ryan Seacrest, claiming that if the Oscars were porn, "this dress would be the money shot." We're glad you felt gorgeous, Gabourey!
Seymour proves she's still got it in this red strapless David Meister gown.