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 ...

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.

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 ...

Pop-punk icons Avril Lavigne and Deryck Whibley reunited onstage over the weekend for a surprise performance of Sum 41’s “In Too Deep” during Lavigne’s headlining set at the Vans Warped ...