Burger Records held their fourth annual Burgerama festival at the Observatory in Santa Ana this past weekend. The two-day fest featured appearances from bands like Together PANGEA, Fidlar, La Luz, Gang Of Four, Public Access T.V. and many, many more. Ty Segall and Weezer were the headliners, and Rivers Cuomo’s dad Frank Cuomo made a special guest appearance on “Back To The Shack.” Cuomo addressed his recent reunion with his estranged father in a lengthy Rolling Stone interview prior to the release of Everything Will Be Alright in the End last fall. You can get a closer look of father and son jamming out together and watch video of Weezer’s full set below; Cuomo’s dad shows up at the 30-minute mark. Above, scroll through the rest of our pictures from the festival.

Weezer's Rivers Cuomo rocking alongside his dad, Frank Cuomo, "for the first time in Weezer history" last night during Burgerama at the Observatory (3.28.15) #Weezer #RiversCuomo #FrankCuomo #burgerama4

A photo posted by David Brendan Hall Photography (@dhallphoto) on Mar 29, 2015 at 11:22am PDT