GQ hosted their Men of the Year party at LA's Chateau Marmont last night. Ben Affleck was on hand to celebrate his honor after a big year that's included the release of his hit movie Argo and the birth of his third child, a son named Samuel. Ben shared the honor with Channing Tatum, who today was also named People's Sexiest Man of the Year. Channing wasn't able to attend the bash, but he was represented by his wife, Jenna Dewan. Rihanna earned the magazine's title of Obsession of the Year, and she swung by the Chateau in a hot red dress from Calvin Klein. Also out to celebrate with GQ was a Cushnie et Ochs-clad Diane Kruger, and a whole group from Revenge that included a Reem Acra-wearing Emily VanCamp, Joshua Bowman, Christa B. Allen, and Ashley Madekwe.
The annual event brought out plenty of stars to toast Ben, Channing, and Rihanna. Adam Brody, Chace Crawford, Max Greenfield — another of People's hottest men of 2012 — and Seth MacFarlane mingled together. Alessandra Ambrosio, in Sally LaPointe, celebrated a week after the Victoria's Secret show with her fellow Angel Erin Heatherton. Click through to see them, as well as photos of all the celebs who posed on the black carpet.