Beckett Rex Quits ‘American Idol’ In Third Dropout Of The Beckett is the beloved artist who engrossed multitudes of admirers with his remarkable talent on American Idol. American charmed viewers across the nation with his riveting vocals and unforgettable stage presence. His decision to depart the show shocked the public, leaving his fans saddened. However, Rex will always be remembered as an legend in the history of American Idol.