Carrie Underwood and Casey James will perform Thursday (April 4) on American Idol, the series that launched their national careers. Underwood will perform "See You Again," the fourth single from her Blown Away album. James will debut his new single, "The Good Life," the third release from his self-titled debut album. "This is a dream come true," James said. "To be returning to the show as an artist, to sing and play music that I wrote, co-produced and poured myself into, it doesn't get any better for me! I think 'The Good Life' is such a fitting song, too."