Billy Corgan performs onstage during the 2026 Songwriters Hall Of Fame Induction Ceremony at The New York Marriott Marquis on June 11, 2026 in New York City. (Theo Wargo/Getty Images for for Songwriters Hall Of Fame)Here’s the story of a lovely Smashing Pumpkins show, which featured two surprise guests, including a member of The Brady Bunch. Barry Williams, who played the eldest Brady son Greg Brady in the classic ’70s sitcom, joined Billy Corgan and company onstage during their pre-Lollapalooza concert in Chicago on Wednesday. Auf der Maur played in the Pumpkins from 1999 to 2000 following the departure of original bassist D’arcy Wretzky. The Smashing Pumpkins will perform a headlining set at Lollapalooza on Friday night, marking the first time they’ve played the festival since it moved permanently to the band’s hometown of Chicago in 2005.