What song is this that christina aguilera sings?!

Question: What song is this that christina aguilera sings!?

i found this on youtube listen to christina one what song is it!? please i need to know!

http://www!.youtube!.com/watch!?v=kTGqE7Fk8!.!.!.Www@Enter-QA@Com

Answers:

Oh, i love that performance of hers!.
She covers "At Last" By Etta James (:Www@Enter-QA@Com

I don`t think it is a song, I think she`s just vocalising!.Www@Enter-QA@Com

At Last--you have probably heard it sung by Etta James!.Www@Enter-QA@Com

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