“I’m worried, I’m stressed,” he said during rehearsals. “I’m not saying I can’t do it, but it probably will be one of the biggest challenges of the season for me.”

Jessica Simpson took the "American Idol" stage Sunday night for her first television performance in 15 years.

Jamal Roberts, a 27-year-old PE teacher from Meridian, Mississippi, won the popular vote to become the "American Idol" Season 23 champion during the May 18 finale.