How much do you know about American Idol? Take our quiz.

Simon Cowell, the British judge in a T-shirt, is almost forgotten. Keith Urban, Nicki Minaj and Mariah Carey are settling into their roles as judges. But even with the changes and the arrival of competing singing shows, American Idol still reigns as one of the most successful shows in television history. How well do you know this pop-star machine? Take our quiz.