Just in case you were gonna cap off your day by body-shaming Ariana Grande on Instagram, here's one huge reason to reconsider -- you know, other than the fact that making fun of someone else's appearance makes you the worst.

Nicki Minaj shared a video of her performing with Ariana during the NBA All-Star Game halftime show on Sunday (Feb. 15), which, according to Hot 97, prompted one troll to leave a nasty comment about the "One Last Time" singer's behind.

Ari saw the comment, and gave that troll a piece of her mind: "when did it become socially acceptable to comment on what you think is 'wrong' with other people's bodies?? we were having fun! dancing on stage. 'what's she shaking tho???' i'm shaking my pretty, cute, petite ass next to nicki's pretty, big booty. both are f--king awesome."

Moral of the story: Ariana Grande will go into the IG comments and hunt you down if you say something rude about her. Another wonderful reason to never body-shame Ariana Grande -- or anyone else. Unless you're cool with that whole "literally being the worst" thing.