Steven Tyler defends national anthem performance (AP)

FILE - In this April 3, 2011 file photo, singers Steven Tyler and Carrie Underwood perform at the 46th Annual Academy of Country Music Awards in Las Vegas. Enduring negative criticism at the AFC football game last month did not stop Tyler from enjoying pre-Super Bowl festivities with Carrie Underwood Thursday Feb. 2, 2012. The duo are in Indianapolis to perform together for CMT's “Crossroadsâ€? which brings singers from different genres together for a concert.  (AP Photo/Julie Jacobson, file)AP – Steven Tyler says he meant to sing the national anthem like that.

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