The "Bang Bang" hitmaker confirmed she has signed up to star in the production on Twitter with the post "True #GreaseLive" and while she won't be part of the main cast, she'll perform a live version of the song 'Grease (Is the Word)' by songwriter Barry Gibb to open the show.
The pop star gushed about her new job to her eight million Twitter followers, posting, "Grease is the word! I'm thrilled to announce that I will officially be joining the @GreaseLive family!"
"Safe Haven" star Julianne Hough and "Les Miserables" actor Aaron Tveit will play the roles of lovers from opposite sides of the track Sandy and Danny.