Water under the bridge for Avril Lavigne and her ex-husband Deryck Whibley. Lavigne, 39, joined Sum 41’s Whibley, 44, on stage at the MGM Grand Garden Arena to perform a duet of his band’s ...

Avril Lavigne and her ex-husband Deryck Whibley may be divorced, but their relationship still has a happy ending. The "Girlfriend" singer, 39, invited her ex-husband and fellow Canadian rocker ...

Her music is s---.'" Sum 41 frontman Deryck Whibley is reflecting on his relationship with Avril Lavigne — and how hostile responses from both of their fans got to his head.

It's clear things are not too complicated between Avril Lavigne and her ex-husband, Sum 41 frontman Deryck Whibley. Instead, nearly 15 years after they called it quits, they seem to be quite ...

Avril Lavigne & Ex-Husband Deryck Whibley Reunite On Stage During Las Vegas Concert The "Complicated" singer brought out the Sum 41 frontman to perform his own classic song during her "Greatest ...

Deryck Whibley, Lavigne’s ex-husband, was on hand to perform “In Too Deep” from his band Sum 41. Lavigne seemed stoked to have him there, which is nice. Love to see the magnanimity.