Christina kicked things off with Cher, who she totally replicated with ease. Maybe that time on the set of Burlesque gave her some time to study the material first-hand?
She also landed on Britney Spears – someone she also has some personal experience with, as the two stars were on The All-New Mickey Mouse Club together back in the day (plus they had that whole racy MTV VMAs performance with Madonna). Holy wow, Christina managed to get Brit's inflection spot-on, and with the song choice of "This Little Piggy," it was all that more impressive.
Finally, she gave Shakira a whirl and landed some of the Latin singer's signature accent and articulation pretty masterfully. Given that Shakira replaced Christina on The Voice, and Christina has spent time with Cher and Britney, we're kind of questioning just how "random" this musical impression game is, Jimmy!