The glamorous — and long — red carpet at the Met Gala gives stars the chance to make grand entrances as they head inside the Metropolitan Museum of Art for the annual Costume Institute Benefit. Once inside, though, it's all about mixing and mingling for the famous faces, and Monday night brought just that. Jennifer Lopez cozied up to fellow songstress Gwen Stefani while Beyoncé Knowles greeted Gavin Rossdale with a kiss. Emily Blunt and Anne Hathaway teamed up next to designer Tom Ford, and Olivia Wilde and Katie Holmes shared a table with Calvin Klein's Francisco Costa. There are lots more celebrity snaps from inside the big bash — click through to see them all!