Nicole Scherzinger is currently gearing up for the 13th season of The X Factor UK, and during a photo call on Friday, the former The Pussycat Dolls singer proved that she's got what it takes when it comes to celebrity impressions. Not only did she get a laugh from Simon Cowell [1] at her spot-on Shakira [2] impersonation, but she also completely nailed it when it came to Britney Spears [3]. Of course, Nicole isn't the first star to blow us away with her celebrity impersonations; Christina Aguilera and Ariana Grande have also channeled a few stars [4] of their own.