Every week, celebs post some pretty funny pictures to Instagram, which is why M rounds up the silliest ones! This week, Ariana Grande posted an absolutely hilarious selfie, Shay Mitchell was caught drinking out of a Teenage Mutant Ninja Turtles mug, and Justin Bieber stuck his tongue out while recording in the studio. Who has the silliest pic of the week? It's up to you!
Check out these totally silly Instagrams and don't forget to vote for your favorite pic of the week on the last page!