VIDEO : Demi Lovato And Nick Jonas Surprise Fans With 'Future Now' Tour

Fans are in for more than they expected from Nick Jonas and Demi Lovato's tour 'Future Now.' On Friday, during the Brooklyn leg of the concert, Demi Lovato surprised everyone when she invited special guest Jamie Foxx on stage to help her sing a cover of the Ray Charles song, 'Georgia On My Mind.' That is not the only surprise guest Demi and Nick have featured on their tour. Previous guests have included Desiigner, T.I., and Andra Day.