LOS ANGELES: SELENA Gomez and Demi Lovato are at war - over a movie role that’s got Oscar written all over it. The pair are apparently both keen to star in the sure-to-be-a-blockbuster big-screen biopic about tragic Linda Ronstadt, who’s been struck down by Parkinson’s disease and can no longer sing a note! “Linda was one of the greatest singers of her generation, and her life story is mesmerizing,” said a source close to the film project. “It’s a dream role with huge Oscar potential. Selena Goemez and Demi Lovato are both crazy for the part, and claws are being bared!”–SP