Wandering Aimlessly

I've never seen the show. I kind of wish I had, because now maybe things would make more sense. I have nothing against Kelly or Justin, and I, in fact, kind of like them. On principle, because I haven't really seen them/heard them sing. But I just saw a commercial for Kelly's Driven. Can someone please explain to me the concept of Driven again? Isn't it a look back on how successful artists got to where they are, up until they "made it big"? I guess while you're at it, you might want to explain to me the concept of American Idol. I didn't realize that, at this point, she'd "made it big." I thought she just got a record deal out of it, or something. This seems to me to be a starting point for her. From here, she can "make it big." Right? Something in this equation just isn't adding up to me...