Sienna Miller always kills it on the red carpet, and tonight's look was no different. We're all about the fringed beading on her two-piece ensemble.
Anne Hathaway in Ralph Lauren
The dress itself is well-made and the fabric looks like liquid gold, but we just can't get on board with the hood.
Poppy Delevingne in Marchesa
Poppy, wearing her namesake in a gown, is absolute perfection.
Beyonce in Givenchy
Leave it to Beyonce to make an even bigger splash than Sarah Jessica Parker's headdress and Rihanna's HUGE golden robe. What do you think of her nearly-naked look?
Chloe Sevigny in JW Anderson
We found this look to be over the top in all the wrong ways.
Allison Williams in Giambattista Valli
Williams is typically very "safe" on the red carpet, so we were thrilled to see her take a chance in this voluminous Giambattista Valli gown.
Solange in Giles
There's no way to call this a "worst," it's just too cool and out-there! Not really sure how it fits in with tonight's theme, but she positively glitters.
Kris Jenner in Balmain
Jenner's look was just a little too much... of just about everything.
Rihanna in Guopei
Rihanna stole the show when she arrived in this golden robe with matching headpiece and Louboutin heels. Certainly what she was going for, we're sure!
Chloe Moretz in Coach
Chalk this up as one of the more yawn-inducing dresses of the night.
Diane Kruger in Chanel Haute Couture
This woman can do no wrong, and we're obsessed with this Chanel look.
Sarah Jessica Parker in H&M
SJP's headdress is ah-ma-zing, we're not denying that. Her dress, however, does nothing for us. What do you think?
Kerry Washington in Prada
We LOVE Kerry, and love the risk she took with this voluminous gown, but it didn't strike the right chord for us. Perhaps it's the shoes?
Keri Russell in Altuzarra
We absolutely loved this feathered creation on Keri, and the color was such a refreshing change for this red-dominated carpet.
Katy Perry in Moschino
You can't deny that Katy loves to take a red carpet risk, and this dress was pretty darn cool. She pulled this one off!
Kim Kardashian in Roberto Cavalli
Kim's gown was so stunning last year, that we find ourselves disappointed with this one. It's extremely intricate, but it just doesn't work for her.
Lady Gaga in custom Balenciaga
Okay, it's a very cool piece. And it's very Lady Gaga. It's just too much for us!
Miley Cyrus in Alexander Wang
It feels like we've seen this dress before -- a couple times -- from Miley. It also seems better suited to a "futuristic" theme!
Jennifer Lopez in Versace
The gown was a bit much for us when J.Lo turned to the side to reveal it was totally sheer, but the intricacies and ombre skirt won us over in the end. Plus, if anyone can pull off a gown like this, she can!
Miranda Kerr in custom Louis Vuitton
Not many people wear mini skirts on this red carpet, so it's totally refreshing when someone does -- and does it so well.
Sofia Vergara in Marchesa
Sofia is always gorgeous, but she looked positively ethereal in this classic sweetheart gown.
Jennifer Connelly in Louis Vuitton
We can appreciate the statement Connelly was trying to make with this gown, but it missed the mark.
Hailee Steinfeld in Michael Kors
Hailee may have chosen the most-worn color of the night, but her elegant gown was a win for us.
Okay, so it doesn't really fit with the theme (much at all...) but Carey looks so elegant, she had to make our best dressed list.
Robert Pattinson in a black tux and FKA Twigs in Christopher Kane
Pattinson looked dapper as ever, but we're not big fans of FKA's graphic gown.
Zendaya in Fausto Puglisi
This look probably isn't easy to maneuver in safely (forever afraid someone will step on your train!) but it's just stunning. Zendaya looks youthful yet elegant in this incredible creation.
Hello handsome! Usher was looking very dapper in his all-black suit, and even though he needed his cane to support his foot post-surgery, it certainly added to the look.
Lizzy Caplan in Donna Karan
This gown draped so perfectly on Lizzy, she looked gorgeous.
Mary Kate and Ashley Olsen
It's not that the twins look bad per se, we just are always hoping for something exciting from them, and this was not the night.
Gigi Hadid in Diane von Furstenberg
Gigi looked gorgeous in this gown by DVF, a moment where we certainly feel that simplicity won out.
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The 2015 Costume Institute Gala, home of one of the year's most memorable red carpets, was held Monday night at the Metropolitan Museum of Art in New York City. With the theme "China: Through The Looking Glass," we were certainly expecting to see lots of red, embroidery and flowers, and the designers did not disappoint.
The red carpet was filled with crimson gowns -- from the simple and elegant to the over-the-top and extreme -- and Fashion's Biggest Night once again saw plenty of Hollywood's biggest stars. Many stayed true to the theme, donning stunning floral appliques or embroidery and traditional silhouettes, but as can always be expected at the Met Gala there were plenty who took it to the next level.
Rihanna stepped onto the carpet in a show-stopping gold robe with a matching headdress, and Kim Kardashian wore an icy sparkling gown with a feathered skirt. Beyonce made quite the appearance in a nearly-naked creation by Givenchy, out-shocking everyone everyone else who stepped on the carpet.
Two of our favorite red carpet style mavens, Sienna Miller and Diane Kruger, chose to forego gowns and as such were possibly two of our favorite looks of the night. With all this glamour, however, there is bound to be a few major fashion misses. Click through above to see our favorite -- and least favorite -- picks of the night.