Mum-of-two Christina was challenged by Jimmy to a game of random musical impression - and she was pretty impressive!
(Skip to 1.40 in the video below):
The 'Fighter' singer impersonated the likes of Cher and David Bowie, but her impression of pop sensation Britney was the most memorable of the night.
The 34-year-old had to pretend to be Britney while singing 'The Little Piggy', and she looked in her element as she grabbed hold of the mic.
Once she finished, the studio audience erupted into cheers and an impressed Jimmy even gave her a standing ovation. Jimmy raved to Christina: "That was fantastic."
Over the weekend, Christina looked stunning in a floor-length sequin gown as she attended an Oscars after party with fiancé Matthew Rutler.
Christina also shared a sweet photo of the couple on Twitter, simply saying: "Stepping out with my baby!"
It's set to be an exciting year for Christina, as not only has she resumed her coaching duties on The Voice US, but she has also landed a role on hit US series Nashville.
Reveal is now on Google Plus! Join us here for the latest pictures, fashion and celebrity news!
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!