Say what you want about Ariana Grande (her attitude, the donut licking, all that), but she can sing and her impressions are dead on. 

She teamed with Jimmy Fallon and they totally killed it with this.  Want to see Ariana's take on Britney Spears, Christina Aguilera, and another dead-on impression of Celine Dion.

Now, what all the confused squinting was all about?  You got me.