How can you complete the guitar star challenge in the sims 3?

First go to the theatre then get the job there. you have to learn your guitar skill to get promoted faster and faster but when you work you have to selected the work hard then when you get to a certain level you get to chose if you want to be a rockstar career or sometin else but you have to take the rockstar career then you keep getting promoted then your a rockstar then you can do kool stuff like ride in limo's.