The Boss performed with the artist who has become known as his “heir.” Bruce Springsteen surprised the audience at Zach Bryan’s concert Sunday night at MetLife Stadium in Ea

Callow Followill is back onstage following a "freak accident" that broke his foot in May. He performed with Zach Bryan and Bruce Springsteen, singing the latter's "Atlantic City" on Sunday, July at MetLife Stadium in New Jersey.