While Shea was known for the Mets, it was almost as world famous as a concert stage... acting as an arena for such bands as Eric Clapton, Sting, Jethro Tull, Bruce Springsteen, Billy Joel and the Beatles. Citi Field has already gotten off to a hot start by going back to their roots and bringing back Paul McCartney as their inaugural act. Paul graced Shea Stadium not once but twice, as the Beatles played the first and second concerts ever at Shea Stadium. It seemed only appropriate that Paul come back to town to open Citi Field as a concert stage.