NFL: Beyonce not the cause of Super Bowl blackout

Beyonce, center, Kelly Rowland, left, and Michelle Williams, of Destiny's Child, perform during the halftime show of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Marcio Sanchez)  Photo by
Beyonce, center, Kelly Rowland, left, and Michelle Williams, of Destiny's Child, perform during the halftime show of the NFL Super Bowl XLVII football game between the San Francisco 49ers and the Baltimore Ravens, Sunday, Feb. 3, 2013, in New Orleans. (AP Photo/Marcio Sanchez) Photo by
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