Trey Anastasio of Phish, Billy Strings and Sturgill Simpson were among the special guests to join the band over three nights of concert and amid a city-wide celebration.

Ever. Why? Because at this point, 60 years after the Grateful Dead made their mark on this psychedelic town, it's no longer about the band personnel as much as it is all about The Vibe.

Trey Anastasio, Sturgill Simpson and Billy Strings joined the Grateful Dead offshoot for three San Francisco shows celebrating 60 years of Grateful Dead music.