Avril Lavigne's ex-husband Deryck Whibley and his girlfriend Ari Cooper dressed as Avril and her fiance, Nickelback singer, for Halloween. And cross dressed.
Here are some of the weirder celebrity Halloween costumes we've seen ...
Avril Lavigne and Chad Kroeger got engaged this summer; few knew they were even dating. For Halloween, Deryck was Avril, and Ari was Chad. The above photo was Tweeted.
The really funny part?
Kroeger saw the pic and Tweeted back to the Sum 41 frontman: "Hey Deryck loved the costumes! we were going to dress up as you guys this year but all the parties had celebrity themes haha! -CK"
Deryck Whibley? Served.