In I Left My Heart: A Salute to the Music of Tony Bennett, a talented cast of entertainers takes the stage at Chicago's Mercury Theater with 40 of the legendary crooner's biggest hits, including "Because of You," "Stranger In Paradise," "The Best Is Yet To Come," "When Will The Bells Ring For Me" and of course, his signature tune, "I Left My Heart In San Francisco." Over the course of Bennett's 60-plus-year career, he's sold more than 50 million records, earned 19 Grammy Awards -- including a prestigious Lifetime Achievement award -- and was referred to by Frank Sinatra himself as "the greatest singer in the world."