Hunter Hayes has signed on to perform on VH1's Philly 4th of July Jam Thursday night. He's replacing pop star Demi Lovato on the bill since she's down with a case of tonsillitis.
The show starts at 8 p.m. ET and fans can stream the show at VH1.com too. John Mayer, Ne-Yo and Grace Potter are among the other acts performing.
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