Ariana Grande is really starting to scare us.

The 21-year-old pop star teased her upcoming role on Ryan Murphy's horror-comedy "Scream Queens" on Instagram.

Okay, this Insta teaser is perfect, but is Ari a KNT (Kappa Nu Tau) or a KKT (Kappa Kappa Tau) kind of sorority gal? It looks like we'll have to wait to find out.

Ari's recurring role on the upcoming Fox series is a bit of a mystery. The cast of "Scream Queens" -- which includes Emma Roberts, Lea Michele, Keke Plamer and Nick Jonas -- is filming in NOLA, but Grande is currently traveling the world on her Honeymoon Tour. So when will Ari even have the time to film her scenes? Given the gap in her touring schedule, it looks like Ari may start shooting in April, so you may want to be on the look-out for Instas with the super adorable cast.

"Scream Queens," which will premiere in the fall, follows a college campus struck by a series of murders and a group of sorority girls who find themselves in the middle of it all. Murphy teased that the show would follow a "murder mystery" format and that every week, someone would get "knocked off."

Given her busy touring schedule and the size of this star-studded cast, we wouldn't be surprised if Ari got the Drew Barrymore in "Scream" treatment. Even if Grande is the first KNT sister to go, we'd still watch the s--t out of this show. Three words: naked Nick Jonas.