For some ladies, one couture look just wasn't enough for the night. A number of the Met Gala's best dressed guests opted to dress things down to party into the early hours of the morning at the Boom Boom Room. While some, like Anne Hathaway, managed to wow us with two designer looks, others, like Amanda Seyfried, left us scratching our heads. Click through to see some of the interesting costume changes at the Met Gala 2013 after party.