Watch: Sam Smith Performs New Single on Jimmy Fallon

English heartthrob plays "I'm Not the Only One" for The Tonight Show

Sam Smith treated the Tonight Show audience to a poignant, heart-wrenching performance of his newest single. Watch “I’m Not the Only One” below.

The suave crooner has skyrocketed to stardom since he stepped out into the spotlight last year. His debut album In The Lonely Hour was released this May to positive reviews.

Smith recently cancelled a Toronto concert due to laryngitis.