As they say, a Tonight Show imitation game is the sincerest form of flattery.
Ariana Grande paid homage to pop queens of decades past, like Britney Spears, Christina Aguilera and Celine Dion, during Tuesday's show, absolutely slaying it. Grande previously did her spot-on Dion impression for the Tonight Show audience in March, and needless to say, it was a true crowd pleaser.