Tiffany Thornton singing 'Someday my Prince will come' from Snow White and the Seven Dwarfs. You can also see Tiffany Thornton in 'Sonny with a Chance' on Disney Channel, weekends at 11.35am. Sonny with a Chance, also featuring Demi Levato, features Sonny, a Midwestern girl with a unique outlook on things, who has always used her performing talents and sense of humor to get her through life. So it was only a matter of time until she was discovered - and asked to become the newest cast member of "SO RANDOM" - a wildly popular teen sketch comedy/variety show. This is much to the chagrin of Tawni, the shows longest running cast member, who doesnt understand why they even need another girl on the show. Thrilled, excited, happy - and scared to death - Sonny must now face the pressures of living up to her dreams to prove to herself, and the world, that she is up to the challenge.