Avril Lavigne Costume Sparks Battle On Twitter

Avril Lavigne's life is as complicated as ever. Her ex-husband, Deryck Whibley, dressed up as the 28-year-old singer for Halloween this weekend. Deryck's girlfriend, Ari Cooper, also dressed up as Avril's current fiancé, Chad Kroeger. Needless to say, the Nickelback musician was not amused...".* Pop Trigger breaks it down.