LOS ANGELES (AP) — Carly Rae Jepsen has been cast as Frenchy in Fox’s live TV staging of the musical “Grease.” Jessie J will open the show with a performance of the song “Grease (Is The Word).” Julianne Hough will play Sandy and Aaron Tveit will play Danny. The live version of “Grease” airs Jan. 31.