FILE - This May 26, 2012 file photo shows U.S. Singer Mariah 

FILE - This May 26, 2012 file photo shows U.S. Singer Mariah Carey performing on stage during a concert at the Mawazine Festival in Rabat, Morocco. Carey and No Doubt are set to perform ahead of the first game of the NFL season Sept. 5 in New York. They will take the stage live for NFL Kickoff 2012 from Rockefeller Plaza before the New York Giants take on the Dallas Cowboys at MetLife Stadium. The hour-long pregame show will air at 7:30 p.m. ET on NBC.  (AP Photo/Abdeljalil Bounhar, file)
Associated Press
FILE - This May 26, 2012 file photo shows U.S. Singer Mariah Carey performing on stage during a concert at the Mawazine Festival in Rabat, Morocco. Carey and No Doubt are set to perform ahead of the first game of the NFL season Sept. 5 in New York. They will take the stage live for NFL Kickoff 2012 from Rockefeller Plaza before the New York Giants take on the Dallas Cowboys at MetLife Stadium. The hour-long pregame show will air at 7:30 p.m. ET on NBC. (AP Photo/Abdeljalil Bounhar, file)
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