Amazon Studios Celebrates "Long Strange Trip" At The 2017 Sundance Film Festival, Featuring A Performance By Mickey Hart, Bill Kreutzmann, And Bob Weir - 2017 Park City

PARK CITY, UT - JANUARY 22: Bob Weir of The Grateful Dead performs onstage during the Amazon Studios celebration of "Long Strange Trip" at the 2017 Sundance Film Festival, featuring a performance by Mickey Hart, Bill Kreutzmann, and Bob Weir, on January 22, 2017 in Park City, Utah. (Photo by Todd Williamson/Getty Images for Amazon)