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Country Singer Apologizes After Getting Caught 'Cheating' During National Anthem THR

A country singer is apologizing after he sparked outrage among some baseball fans by glancing at lyrics to the National Anthem, which he had written on the palm of his hand, according to The Hollywood Reporter.

Luke Bryan apologized for the gaffe at the MLB All-Star game in Kansas City Tuesday night, writing on Twitter that he had a "few key words written down to insure myself that I wouldn't mess up."

Bryan added: "I just wanted to do my best. I promise it was from the heart. If I offended anyone with my approach I sincerely apologize. Anytime I sing the anthem it is an honor and my heart beats out of my chest."

The singer isn't the first to have a slip-up with the anthem, with Christina Aguilera flubbing the song at the 2011 Super Bowl and "American Idol" winner Scotty McCreery mixing up the lyrics during game one of the 2011 World Series, the story notes.