The lineup for the upcoming fourth edition of the When We Were Young festival has been revealed, with Blink-182 set to headline alongside Panic! at the Disco, who will perform their album A Fever You Can’t Sweat Out in full. Taking place on October 18 at the Las Vegas Festival Grounds, the festival will also feature performances from Weezer, Avril Lavigne, and many others. Previous editions of the festival have showcased top bands like My Chemical Romance and Green Day as headliners. For more music reviews and festival updates, check out Pitchfork's Sunday Review and make purchases through our affiliate links to support our editorial team.