Last night, during their show in Hollywood, All Time Low were joined by Blink-182's Mark Hoppus for a performance of “Tidal Waves.” You can watch a fan-shot video of Hoppus killing it with Alex Gaskarth and company below. 

Read more: All Time Low’s “Dear Maria, Count Me In” certified Platinum

In April, the band debuted at No. 2 on the Billboard Top 200 their sixth album, Future Hearts, selling 75,000 copies in its first week.

Additionally, ATL's very own Alex Gaskarth and Jack Barakat will be hosting the 2015 AP Music Awards. Cast your vote and purchase your ticket now!