Jon Hamm joined the fun at last night's Hollywood Dominoes fundraiser. The organization's fifth annual gala, held at LA's Sunset Tower Hotel, brought out stars like Edward Norton, Ali Larter, Sophia Bush, and Ben Stiller. LeAnn Rimes wore a revealing Tom Ford dress on the carpet, looking happy to pose for photos. The evening was organized to benefit Paul Haggis's Artists For Peace and Justice organization. Jon apparently ended up the night's big winner, and became the proud owner of a brand new watch. It's a highlight during a busy period for Jon. His Mad Men will be back on AMC on March 25 — check out the new Mad Men promos. He's also got Friends With Kids, a movie written, directed by, and starring his real-life girlfriend Jennifer Westfeldt, opening on March 9.