Ariana Grande cozies up to costar Matt Bennett as they attend the iParty with Victorious screening event on Saturday (June 4) at The Lot in Los Angeles.

JJJ got the chance to talk with Matt, 19, on the carpet and he told us all about Rex’s epic rap battle. “He has a great plot in this whole movie! Robbie (my character) is not the best rapper but we find out that Rex is…which kind of means Robbie subconsciously is…I don’t know. Dan [Schneider] wrote the Inception of kids television and delivered it (laughs).”

FYI: Ariana is dolled up in Prada and completed her look with nude pumps and a Chanel charm bracelet.

15+ pics inside of Ariana and Matt…