Probably they see something in Sasha that will make her a star. The other girls probably did't have what it takes to become a star outside skating. She do have a lot of star qualities, a fresh face and a personality to go with it (something that we don't see because we haven't been around her). All these big name movie stars weren't born like that, they were made into stars. They were all inexperienced when they started out but some have what it takes to get to the top, Sasha might have that quality, you never know.