She ended up getting the role for the TV show, but the pilot episode didn't go over well, so the show was never greenlit. Even without that break-out role, she still garnered quite a successful career.
Camila Cabello - The X Factor
A tiny, young Camila Cabello was first spotted on The X Factor. She was only 15-years-old when she got up on stage to audition for the show. She was eliminated during the "boot camp" stage of the show but returned as part of a powerful girl group, Fifth Harmony.