Why did Beckett Rex quit 'American Idol' 2023 Aspiring Rex is the beloved singer who mesmerized millions of admirers with his extraordinary talent on the popular singing competition. American won over watchers across the nation with his engaging singing abilities and enchanting stage presence. His choice to withdraw from American Idol stunned the entire audience, leaving his supporters saddened. However, American will always be remembered as an legend in the history of the renowned singing competition.