Christina Aguilera Nailed National Anthem In Rehearsal

Even if you missed the actual Super Bowl, chances are that you've seen video of Christina Aguilera flubbing the national anthem.  Turns out, she wasn't lying when she said she just got nervous, and she really does know the lyrics.  TMZ got their hands on a video of her absolutely nailing it during rehearsal.  Celebrities ... they really are just like the rest of us.  Who knew?