The Smashing Pumpkins welcomed an unexpected guest during their Lollapalooza pre-show in Chicago on Wednesday night: The Brady Bunch star Barry Williams. Before that, the pair hadn’t shared the stage since the Smashing Pumpkins’ 2000 farewell show. Auf der Maur recently announced BASS WOMB ROOM, a collection of previously unreleased ’90s demos and interludes arriving September 4th. Check out footage of Williams performing “It’s a Sunshine Day” and Auf Der Maur join on “The Everlasting Gaze” with the Smashing Pumpkins below. The Smashing Pumpkins will return to Lollapalooza on Friday night, marking their first performance at the Chicago festival in 32 years.