Metallica’s James Hetfield and Sammy Hagar launched Acoustic-4-A-Cure back in 2014 to fund research efforts for San Francisco’s Benioff Children’s Hospital, the Pediatric Cancer Program at the University of California. This year’s benefit concert is taking place May 15th at the Fillmore and will feature Bob Weir, Sammy Hagar, Vic Johnson, Sarah McLaughcla, Steve Vair, Pat Benatar & Neil Giraldo, Don Felder, Mick Fleetwood, and Dave Grohl (who will be sitting in for James Hetfield as he is away on tour), among other very special special guests, who will be performing acoustic sets with true once-in-a-lifetime musical moments, collaborations, and more.

Tickets to the intimate event are limited to two per customer, and go on sale March 31 at 10AM exclusively through Live Nation. All proceeds go to funding research for children’s brain tumors. More information can be found on the event’s website.