Christina Aguilera isn't the only female singer who can nail impressions of fellow singers.
She channeled the pop star and The Voice judge while singing a soulful rendition of the theme song of SpongeBob SquarePants.
"Oh my goodness! Oh my goodness!" Fallon exclaimed, standing up. "That is unbelievable! Game over!"
Aguilera had last year showcased on The Tonight Show and on The Voice her superb musical and spoken impressions of Cher, Britney Spears, Miley Cyrus, Sia, Lady Gaga and alternating The Voice coach Shakira.
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