Lauren to me seems like the best choice to be a star right away. She has wonderful stage presence.
I really like Scotty, but they need to coach the boy to hold his mike differently at times and to quit sneering up the side of his face.
James is super but I think he will get lost in the popular crowd. He does great cover work but who knows about anything original...time will tell.
Stephano would make wonderful "Barry White" type sounds that would be romantic and soothing. He should have been around during the "Rat Pack" times with his wonderfully sexy tones.
Who do I think will win??? Don't know but there's not a loner in the bunch.