Watch Axl Rose Sing "Big Shot" and "Highway to Hell" With Billy Joel

To warm up for Guns N' Roses' Sunday night show at Minneapolis' U.S. Bank Stadium, Axl Rose joined Billy Joel onstage during Joel's Friday night set at Target Field. The two covered Joel's "Big Shot" and AC/DC's "Highway to Hell." As Rolling Stone notes, the AC/DC classic is a mainstay of Joel's shows, with a roadie…