On Tuesday night, a number of high-profile musicians gathered at San Francisco’s Fillmore Auditorium for the fifth-annual Acoustic-4-A-Cure benefit concert, which benefitted the pediatric cancer program at UCSF Benioff Children’s Hospital. The sold-out concert, which also doubled as a 76th birthday party for Taj Mahal, focused on a special collaborative super jam led by Taj Mahal, Bob Weir, and Sammy Hagar, and saw a surprise appearance from famed producer and bassist Don Was.

During Bob Weir’s acoustic set, the iconic Grateful Dead guitarist offered up a take on “Only A River”, a number off his 2016 solo album, Blue Mountain, as well as “Easy Answers”, a relatively rare collaboration between Bob Weir and Robert Hunter, which was debuted by the Dead in ’93 and performed less than 50 times between then and June of ’95. Weir’s acoustic set also saw the Grateful Dead guitarist invite out REO Speedwagon’s Kevin Cronin for the fan-favorite “Friend Of The Devil”.

During the night, the show served as an informal reunion for the members of Chickenfoot for the first time since May of 2016. Chickenfoot is an outfit featuring Hagar, his former Van Halen bandmate Michael Anthony, Red Hot Chili Peppers drummer Chad Smith, and famed rock guitarist Joe Satriani. During Chickenfoot’s truncated four-song set at Acoustic-4-A-Cure, the band laid out renditions of “Big Foot”, Sexy Little Thing”, “Something Going Wrong”, and “Oh Yeah”.

Given that the show fell two days before Taj Mahal’s 76th birthday, during the concert, celebrity chef Guy Fieri took all the attendees to flavor town, providing the beloved blues singer and his musical companions at the show with a custom-made cake. During Taj Mahal’s set, the singer and guitarist performed beloved numbers like “Corrina” and “Fishin’ Blues”.

While the various artists got the chance to perform brief sets of a few songs, the pinnacle of Tuesday’s Acoustic-4-A-Cure concert was its all-star jam, which saw the many big musical names come together. You can watch a recently released pro-shot video of Hagar, Taj Mahal, Weir, Was, Cronin, Satriani, Smith, Anthony, and Vic Johnson perform Otis Redding’s classic “(Sittin’ on) The Dock of the Bay” below.

[Video: Sammy Hagar]

[H/T Rolling Stone]