Madonna headlines Super Bowl halftime show (AP)

Kelly Clarkson sings the national anthem before the NFL Super Bowl XLVI football game between the New York Giants and the New England Patriots, Sunday, Feb. 5, 2012, in Indianapolis. (AP Photo/Chris O'Meara)AP – Kelly Clarkson, Blake Shelton and Miranda Lambert’s pregame patriotism is the Super Bowl’s opening act before Madonna takes her spot in the Super Bowl halftime spotlight.

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