Jem Aswad Senior Music EditorClive Davis and New York City Mayor Bill de Blasio announced the artists who will be joining Bruce Springsteen, Paul Simon and Jennifer Hudson at the New York City “homecoming concert” in New York’s Central Park on August 21: Andrea Bocelli, LL Cool J, Kane Brown, Elvis Costello, Earth, Wind and Fire, Kenny “Babyface” Edmonds, Cynthia Erivo, Jimmy Fallon, Wyclef Jean, Journey, the Killers, Gayle King, Don Lemon, Barry Manilow, Polo G, Patti Smith, Rob Thomas with