The Grammy nominated rocker surprised the crowds at the Palace of Auburn Hills, in Detroit, when he took to the stage halfway through Jon Bon Jovi's performance of Wanted Dead Or Alive.
Kid Rock, real name Robert James Ritchie, is gaining a reputation for surprise visits - he previously dropped in at a Black Eyed Peas gig.
He is expected to join Bon Jovi in London - the band are well into their Circle world tour and will be coming to London in June for a 12-date residency.
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