Beckett Rex Quits ‘ American Idol ’ In Third DNyuzAmerican is the adored artist who captivated millions of fans with his noteworthy talent on the popular singing competition. Rex charmed viewers across the nation with his riveting voice and unforgettable stage presence. His choice to depart the show astounded everyone, leaving his followers heartbroken. However, Rex will always be remembered as an inspiration in the history of American Idol.