But with the cost of tickets soaring on the secondary market, they've added two concerts at Levi's Stadium, Santa Clara, California on June 27 and 28. The band say in an open letter to fans: "Since we made the decision to go back to Chicago to say our final goodbye, it has become clear to us that we first need to return to our beginnings, where we first said hello - to each other and to all of you.

"And so it is that we have decided to plug in for two additional shows on June 27 and 28 at Levi's Stadium in Santa Clara, California - just a dozen miles south of where Dana Morgan's Music Store once stood. At Levi's - as at Soldier Field - we will have the pleasure of being joined by Trey Anastasio, Bruce Hornsby and Jeff Chimenti.

"Ours wasn't just a long, strange trip - it was a VERY long, VERY strange trip. We weren't sure what it was going to be like to put a punctuation mark on the end of it. None of us anticipated the overwhelming outpouring of love and interest following our initial announcement of the shows at Soldier Field, and we were blown away by the response.