ET has video of Tom Selleck, Michael Madsen, Lucy Liu, Jane Seymour and other celebs as they joined hundreds of other mourners at David Carradine’s funeral service in Los Angeles.   The scene was somber on Saturday as the mourners gathered at Forest Lawn cemetery to pay their respects to the 72-year-old "Kung Fu" actor, who died earlier this month in Bangkok, Thailand. Also spotted at the service were Edward James Olmos, Ali Larter, Fances Fisher, James Cromwell and Rob Schneider, who arrived carrying a bouquet of flowers. Speaking of the service, David's brother Bruce told People.com: "It was touching, but light-hearted. There weren't a lot of tears, but there was a lot of laughter."