Ariana Grande Shades Jimmy Fallon in 'Best Friend Challenge'

How well do you know your best friend? Do you know what kind of animal they want to be? The type of food they absolutely hate and makes them go "blurf?" Well of course you do, but not-actual-best-friends (sorry) Jimmy Fallon and Ariana Grande don't, and that's why it makes good TV.

It's a funny little game about seahorses and condiments until Ari goes for the jugular when guessing Jimmy's "most-embarrassing bad habit." We won't spoil the gag-worthy clap-back, but if Jimmy is MIA for the foreseeable future, he's either in hiding or dead. Watch below.

The "Side to Side" singer also, at long last, announced the first batch of dates for her "Dangerous Woman Tour," which kicks off in February.