Avril Lavigne and Deryck Whibley of Sum 41 shared the stage on June 15, 2025, during Lavigne's performance at the Vans Warped Tour in Washington, D.C. This marked Lavigne's debut at the festival, which was celebrating its 30th anniversary after a six-year break.
At the RFK Stadium Festival Grounds, Lavigne invited Whibley to perform Sum 41's 2001 hit "In Too Deep." The audience enthusiastically received the former spouses' energetic rendition of the pop-punk anthem.
Lavigne introduced Whibley, emphasizing the special connection between the artists. This collaboration was a nostalgic moment for fans, as it was their first performance together since Lavigne's 2008 Japan tour.