After blessing the stage during Mary J. Blige’s set at the iHeartRadio Music Festival in Las Vegas over the weekend, Prince brought out his own special guest during his “Welcome 2 America” concert at Chicago’s United Center. Chi-town’s own Jennifer Hudson appeared on stage to duet with the pop icon on “Nothing Compares 2 U.” Looking stunning in a gold dress, the big-voiced diva brought the house down with her hair-raising rendition, which earned applause from Prince himself.