I don't think they have any say in what dance they do, their costumes, or the music chosen (GAH! Cavemen in the audience! GAH! I hate that show and haven't even watched it). Anyways, could be wrong about the choices but I don't think they have any.
9's (it was good but not that good... again.. the hips were off)? Over inflated scores but since they gave out all those 8's that were overinflated they had no other choice.