Christina Aguilera was so confident about singing the National Anthem at Super Bowl XLV on Sunday (Feb. 6) that she didn't even bother finishing the song -- which she nailed -- in on-field rehearsals on Saturday (Feb. 5).


Christina Aguilera Fumbles National Anthem Lyrics at Super Bowl

Video: Christina Aguilera Rehearses National Anthem for the Super Bowl

In footage obtained by TMZ, Aguilera sings roughly half of the Star-Spangled Banner before abruptly stopping and leaving the stage. Although her practice went perfectly, Aguilera let nerves get to her on Sunday when she infamously replaced the fourth line of the song with a repeat of its second line. Watch below.

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