Deryck Whibley & Avril Lavigne reunite for “In Too Deep” performance in Las Vegas
Deryck Whibley and Avril Lavigne prove that being divorced doesn't mean you can't still perform together.The former couple reunited during Lavigne's concert in Las Vegas on June 1 for a joint rendition of the Sum 41 song "In Too Deep."Whibley and Lavigne got married in 2006...