Pop superstar Prince invited local girl Jennifer Hudson to join him onstage during a gig in Chicago, Illinois on Tuesday night (25Sep12). The Oscar-winning singer duetted with her idol on his hit ballad Nothing Compares 2 U, just days after he performed the same track with Mary J. Blige at the iHeartRadio Music Festival in Las Vegas on Saturday (22Sep12). The Chicago gig was one of the first in Prince's Welcome 2 Chicago residency in the city.