Amanda Seyfried

The fun wasn't over for the Met Gala 2013 attendees in NYC last night as they flocked to the Standard Hotel following the ball for the official afterparty at the Boom Boom Room. Madonna stripped out of her bum-baring Met Gala outfit and changed into a fishnet body stocking and black lacy lingerie to mingle with guests like Katy Perry, Allison Williams, and Frank Ocean. She wasn't the only star who made a costume change — Amanda Seyfried took off her gown and changed into a baggy black t-shirt to hit the dance floor with Frank. Meanwhile, Miranda Kerr met up with January Jones, Jennifer Lawrence arrived with Marion Cotillard, Gerard Butler mingled with Karolina Kurkova, andNicole Richie connected with Kirsten Dunst, and Mary-Kate Olsen snuggled with boyfriend Olivier Sarkozy. Mary-Kate and Olivier weren't the only couple at the late-night bash, as Jennifer Morrison was spotted holding hands with her Once Upon a Time costar Sebastian Stan and Kate Bosworth hugged Michael Polish. If you missed out on all the excitement last night, be sure to check out our collection of all the red carpet fashion from the 2013 Met Gala to get caught up!

This year's Met Gala attendees gave us good reason to think two outfits are better than one. And who can blame Ashley Greene for trading her dramatic Marchesa gown for something a little shorter come afterparty? Those iconic Met stairs (read: not ornate-dress friendly) alone could prompt an outfit change, but we think it gives this A-list set another chance to show off one more great look before night's end. Case in point: Allison Williams's surprising dark and sexy twofer, courtesy of Altuzarra. Or how about Madonna's Givenchy Haute Couture tartan and fishnets getup that turned into just fishnets all over? The beauty of seeing fashion's finest is actually seeing them at their finest, and that means outfit changes galore. Which stars were bona fide Met Gala quick-change artists? Find out right this way.

The 2013 Met Gala may have given celebrities a chance to channel their inner punk rocker in NYC yesterday, but once the event drew to a close, it was clear that these edgy new looks were only meant to last for the night. Stars like Cameron Diaz and Miranda Kerr were spotted returning to their normal selves as they left the bash, with Cameron chatting on her cell phone as she waited for her car and Miranda enlisting Michael Kors to help her navigate the stairs in her heels. Emma Roberts got help from Jaime King as she left the party, clutching onto her pal's hand as she carefully walked down the museum's famous stairs while Gwen Stefani made a smooth exit with Gavin Rossdale. Meanwhile, stars like Anne Hathaway and Taylor Swift were showing no signs of slowing down, using the mass exit of celebrities as a chance to catch up with their favorite small-screen stars like Game of Thrones' Nikolaj Coster-Waldau and New Girl's Zooey Deschanel.

Of course, just because the Met Gala wrapped up, that didn't mean the party had ended. Anne, Miranda, and many more celebrities hit up the afterparty at the Boom Boom Room later to dance the night away — be sure to check out the pictures from the Met Gala 2013 afterparty.

Amanda Seyfried graces the cover of May's Allure Magazine, which is also its annual Look Better Naked issue. Amanda has gained notoriety for her turn in Les Misérables and was a red-carpet fixture during award-season festivities. Next up, she's starring in The Big Wedding alongside Topher Grace, Robert De Niro, and Katherine Heigl. In the publication, which hits newsstands April 22, Amanda flaunts her figure in a low-cut floral dress and gets candid about body confidence, singing live in Les Misérables, and portraying pornographic actress Linda Lovelace in her upcoming biopic. Here's more from Amanda Seyfried in Allure:

• On playing Linda Lovelace: "Maybe this is backwards, but because she found the power in herself and in her body at a point, it made me feel comfortable in my own skin in a way that I hadn't been."
• The advice she was given by her vocal coach for Les Mis: "'Imagine deep-throating a penis, get that feeling in the back of your throat, and then sing. That's where your larynx is.'"
• On her breasts: "I saw a picture of them a couple of days ago from when I was 19, and my boobs were way bigger. . . . There was something so beautiful about the size of them. When I look back, I'm like, 'Why did I always give myself such a hard time?' Nobody gave me sh*t about it except me."
• On a reporter assessing that she has the "face of an extraterrestrial": "I like that. I'd rather not be ordinary-looking. I want something different about me. We all want to be originals."