On this episode of "You Sang My Song," Mariah Carey watches YouTube fan covers of her songs "Hero," "Always Be My Baby," "We Belong Together," "Touch My Body," "Heartbreaker," and "My All." Fans react to Mariah watching their music. Mariah Carey returns with a headlining Las Vegas residency at the Colosseum at Caesar's Palace. Tickets are currently on sale at Ticketmaster.com/Mariah