Christina Aguilera got the biggest sporting event in the world off on the wrong note when she butchered the US National Anthem at the start of Super Bowl XLV on Sunday evening in Dallas.

Aguilera messed up the words at the start of the second verse, and her string of runs and riffs looked amateurish as she mangled her way through the near-two-minute performance.

The singer, with hooker-red lipstick, dark nail polish, a knee-length black dress, tights and heels, sang "What so proudly we watched at the twilight's last gleaming" instead of "O'er the ramparts we watched were so gallantly streaming?"

You just sang that same line 20 seconds earlier! Why sing it again? You didn't even get the line right, and only you know what that word was at the end of the sentence. Was it "gleaming"? Maybe "streaning"? Or maybe you realized you had dropped the ball of the grandest sporting stage and instead went with the never-fail "gstreeeenung"?

Really, Christina? Is it that hard to remember the 81 words to The Star Spangled Banner?

You looked drunk, your performance reeked and you failed to get through a song that is ingrained in children from the youngest of ages.

Everything about the song sucked, and we're all just wondering why you even bothered. At least your cleavage was kept to an almost-respectful minimum.

And I thought Lea Michele or the Black Eyed Peas was going to be the worst part of the game's musical entertainment.

Anthem fail.