Best Christina Aguilera Album?


I prefer her more "bluesy" songs but don't have any of her CDs. Where should I start?
Saw her on the Sandy fundraiser accompanied by piano only. Thought it was great!
rja
Give these two a shot. I think you will like them and you can listen to samples before you buy.

http://www.amazon.com/Keeps-Gettin-Better-Decade-Hits/dp/B0031SBOKI/ref=sr_1_2?s=music&ie=UTF8&qid=1352007371&sr=1-2&keywords=christina+aguilera

http://www.amazon.com/Christina-Aguilera/dp/B00000JY9M/ref=sr_1_4?s=music&ie=UTF8&qid=1352007371&sr=1-4&keywords=christina+aguilera
That girl can sing for sure. Let us know what you like.
My favorite is "Back To Basics". It's more soul/jazz/blues/big band style than any of her other stuff.
Yes, the woman has a voice and knows how to use it, what a talent! I've just never paid much attention but the time has come.