Nicki Minaj

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**FILE** Nicki Minaj performs Aug. 14, 2012, on NBC's "Today" show in New York. (Associated Press/Starpix, Amanda Schwab)

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Singer-rapper Nicki Minaj performs at the Radio One Hackney Music Festival in Hackney Marshes in east London on Saturday, June 23, 2012. (AP Photo/Joel Ryan)

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Madonna (center) performs with Nicki Minaj (left) and M.I.A. during halftime of Super Bowl XLVI in Indianapolis on Feb. 5, 2012. (Associated Press)

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Album cover for Nicki Minaj "Pink Friday Roman Reloaded".

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Nicki Minaj performs during the 54th annual Grammy Awards on Sunday, Feb. 12, 2012 in Los Angeles. (AP Photo/Matt Sayles)

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Nicki Minaj (left) and M.I.A. perform during halftime of the Super Bowl game on Sunday. M.I.A., a British hip-hop artist, made an obscene gesture during the performance. (Associated Press)

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Madonna (center) performs with Nicki Minaj (left) and M.I.A. during halftime of the Super Bowl. Madonna wasn't the controversial one this time. (Associated Press)

Eminem, right, accepts the award for best rap album as Nicki Minaj, left, and will.i.am, center, look on at the 53rd annual Grammy Awards on Sunday, Feb. 13, 2011, in Los Angeles. (AP Photo/Matt Sayles)

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Eminem, right, accepts the award for best rap album as Nicki Minaj, left, and will.i.am, center, look on at the 53rd annual Grammy Awards on Sunday, Feb. 13, 2011, in Los Angeles. (AP Photo/Matt Sayles)