The Lanham Brothers, Randy and Barry, likely never dreamed the words American Idol would appear on their posters for the Lanham Brothers Jamboree. But, this month, they are! Jenny Beth Willis, who was one of the Top 20 girls on the most recent season of Idol, is set to headline the June edition of the Jamboree. In fact, in April, she made a surprise appearance on the show and sang an amazing duet with country music star Wade Hayes. Check out their sensational version of "How Great Thou Art." WATCH!