Kara DioGuardi joins the cast of American Idol for its eighth season. She's pictured here with fellow judges.

David Cook thanks the fans for voting him the seventh season champion on American Idol. Cook has gone on to have a successful solo career so far.

Simon Cowell is concerned about the direction of American Idol. He says that changes are in store for the show.

David Archuleta and David Cook are seen here performing for a crowd in Los Angeles. It was just one of many stops on the summer 2008 American Idols Live tour.

Simon Cowell is excited to have <a href="http://www.thehollywoodgossip.com/stars/kara-dioguardi/">Kara DioGuardi</a> aboard American Idol. This pretty judge appears to be a great addition to the panel.

David Cook serenades the crowd during an American Idol performance. The seventh season champion is releasing his debut album in the fall of 2008.

David Cook is making the most out of his American Idol title. The singer is dating a fellow Idol finalist, while also enjoying his time on tour in the summer of 2008.

The American Idol winner and The Hills star make a cute couple... don't you think? We know they're not an actual couple, but still.

Brooke White is dedicating the summer of 2008 to helping those in Africa. The talented singer always came across like she had a big heart.

Paula Abdul appears to care more about her hair than how crazy she looks on TV. But you gotta love the American Idol judge anyway!

Say hello to your top 12. These are the finalists on season nine of American Idol.

David Cook is doing pretty well for himself since winning American Idol. The rocker has found a girlfriend in Kimberly Caldwell and is expecting to release an album in the fall of 2008.