CHICAGO, IL- JULY 05:  Trey Anastasio, Phil Lesh, Bill Kreutzmann, Bob Weir, Mickey Hart, Jeff Chimenti and Bruce Hornsby of The Grateful Dead perform during the 'Fare Thee Well, A Tribute To The Grateful Dead' on July 5, 2015 in Chicago, Illinois. (Photo by Jeff Kravitz/FilmMagic)