Josh Duhamel JoshFergieParty.jpgWith their wedding day fast approaching, Fergie and Josh are celebrating their bachelor and bachelorette parties together tonight.

"They're having a joint bash at a lounge in Santa Monica," an spy tells In Touch magazine.

"They wanted a more tame party and wanted to do it together," the source says.

Even though its a joint affair, there could still be some scandalous moments.

"She's getting plenty of naughty gifts from all her girlfriends," according to the mag.

Let's hope it doesn't get too out of control!! Fergie and Josh are set to tie the knot this Saturday in LA.