Who is Beckett Rex on American Idol Why did Beckett leave Rex is the adored singer who enthralled countless of admirers with his extraordinary talent on American Idol. Idol won over watchers across the nation with his captivating voice and unforgettable stage presence. His resolution to quit American Idol stunned all, leaving his fans crushed. However, Beckett will always be remembered as an inspiration in the history of the renowned singing competition.
