In Touch can exclusively reveal that Fergie and her fiancé, Josh Duhamel, will be celebrating their bachelor and bachelorette parties together tonight! "They're having a joint bash at a lounge in Santa Monica," an insider tells In Touch. "They wanted a more tame party and wanted to do it together." But that doesn't mean they aren't going to celebrate! "She's getting plenty of naughty gifts from all her girlfriends," adds the insider. "Everybody can't wait to help them celebrate." Fergie, 33, and Josh, 36, have been dating for more than four years and are due to wed this Saturday, January 10, in southern California.