Huffpost Entertainment

NFL To Would-Be Halftime Acts: Pay Up

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Rihanna, left, and Chris Martin of the band Coldplay perform during the 54th annual Grammy Awards on Sunday, Feb. 12, 2012 in Los Angeles. (AP Photo/Matt Sayles) | ASSOCIATED PRESS

Coldplay, Katy Perry, and Rihanna: One of them will headline next year's Super Bowl halftime show, and it might just come down to whoever is willing to shell out for the privilege.

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