Credit: Lewis Jacobs/NBC NBC Universal, Inc. Photo: Christina Aguilera Performs on The Voice Season 2 Finale, May 7, 2012

Though she’s currently training the next generation of musicians, Christina Aguilera is a musical force to be reckoned with.

Her fellow Voice coach Blake Shelton called the diva, “One of the greatest female vocalists of all time,” and she is the second top-selling single artist of the 2000s, behind Madonna.

Christina’s hit singles like “Beautiful,” “Fighter,” and “Ain’t No Other Man” have been featured on shows like Glee and Smash, not to mention music competitions shows like The Voice.

She has worked with the likes of Etta James, Whitney Houston, and Tony Bennett. And need we remind you, this girl can sang?

Christina has some amazing pipes and isn’t afraid to show them off. She belts out powerful notes effortlessly, but there’s nothing simple about Xtina’s sound.  

But you tell us: Do you think Christina Aguilera is the best singer on earth? Vote below!

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