Christina Aguilera Flubs National Anthem

NEW YORK (CBS) Christina Aguilera belted out the National Anthem in Arlington, Texas, Sunday night at the Super Bowl and - probably inadvertently - put her own spin on the words to the Star-Spangled Banner.

Instead of singing the song's fourth line with the correct words - "O'er the ramparts we watched were so gallantly streaming?" - Aguilera sang, "What so proudly we watched at the twilight's last gleaming?"

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According to Billboard, her error was a merge of the second line with the fourth line.

(Watch the video below to hear Aguilera's change.)

To be fair to Aguilera, the song is difficult and the stage - the Super Bowl is watched by millions and millions and millions and millions of viewers - is at one of the biggest events in the world.

Aguilera's not the only singer to make a mistake belting the National Anthem. In 2009 Jesse McCartney goofed the words before the NASCAR Fontana Race. In Dec. 2010, the lead singer of the Eli Young Band flubbed the words before a Kansas City Chiefs-Denver Broncos game.