Christina Aguilera FAIL in super bowl

Poor Christina, embarassment infront of millons of people. I ask myself how can she fail when shes like an expiranced artist. Not to be mean but I started to laugh because she messed up badly i mean you can hear the words where she messed up. Half thru the national anthem i started to hear people BOO! at her. I think they should have put another artist, but almost every artist would be nervous if it was LIVE but they shouldnt mess up like that. So its sad.