So who’s it going to be: Clay or Ruben? Thirty million people can’t stand the suspense. Inside ‘American Idol,’ TV’s most addictive show May 26 issue — Simon Cowell never lets you see him sweat, but at the moment he’s looking a little damp. It’s Tuesday afternoon, hours before the “American Idol” semifinal, and the last rehearsal is just beginning. Paula Abdul shows up with her ubiquitous Chihuahua, Thumbelina, chats with Randy Jackson and half-listens to the performances. Finally, Cowell can’t stand it anymore. “Can I give you some advice, Paula?” he says. “You look nice. Just don’t talk.” SIMON’S...
