Back of The Partying Didn't Stop After the Costume Institute Gala After the stunning red carpet, many of the fashionable stars of the Costume Institute Gala headed over to an afterparty hosted by Marc Jacobs at the Monkey Bar in NYC last night. Jessica Biel and Justin Timberlake changed out of their formal wear into something more playful to party the night away. Kate Hudson, Liv Tyler, Kate Bosworth, Agyness Deyn and Stella McCartney all crammed into the backseat of a car, staying together after walking the red carpet. It was hard to miss Madonna in her eye-catching outfit as she went home on the arm of Jesus Luz. Josh Hartnett joined in on the festivities looking dashing in his tux, and even Naomi Campbell came out to play despite boycotting the gala. Don't forget to check out all of Fab and Bella's coverage today of the glitzy event. View 40 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Splash News Online To see more photos including Claire Danes, Selma Blair, Rihanna and many others just . View 40 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Photo 10 Photo 11 Photo 12 Photo 13 Photo 14 Photo 15 Photo 16 Photo 17 Photo 18 Photo 19 Photo 20 Photo 21 Photo 22 Photo 23 Photo 24 Photo 25 Photo 26 Photo 27 Photo 28 Photo 29 Photo 30 Photo 31 Photo 32 Photo 33 Photo 34 Photo 35 Photo 36 Photo 37 Photo 38 Photo 39 Photo 40 Images include: Justin Timberlake, Madonna, Kate Hudson, Jessica Biel, Stella McCartney, Rihanna, Agyness Deyn, Jesus Luz, Liv Tyler, Kate Bosworth, Naomi Campbell, Josh Hartnett, Claire Danes, Hugh Dancy, Bruce Willis, Emmy Rossum, Eva Mendes, Anne Hathaway, Blake Lively, Penn Badgley, Selma Blair, Katy Perry, Miranda Kerr, Bar Refaeli, Kirsten Dunst, Billy Joel, Katie Lee Joel Comments Suspiria 8 years Kate Bosworth is SO ridiculous. Why she is holding Liv's arm like that? She thinks Liv is her man?!? :ponder: cupcakers 8 years oh it must have been fun riding in the car! I love Liv, Kate, and Stella! And Jessica should have worn that blue dress instead for the Gala red carpet Asche 8 years Holy pit stains, Madonna! annamari 8 years i prefer Jessica's blue dree, too. jaan_black 8 years Jessica looks pretty in this blue dress but she usually looks fab to me superstar2780 8 years biel's blue dress is so much better than that red one she had on earlier! it is a bit shiny, but the color is pretty. ilanac13 8 years well - jessica certainly has a bright blue dress on. everyone has to love a little mylar wanna be type material.