Watch Josh Groban & Kelly Clarkson Perform 'Phantom of the Opera' Duet for PBS Special

Josh Groban’s long-awaited Stages PBS special is set to debut in December, and the singer is giving fans a sneak peek of a very special duet performed with Kelly Clarkson.

The original American Idol champ joins Groban for a goose-bump-inducing performance of “All I Ask of You” from Phantom of the Opera. The song is featured on Groban’s album Stages, which debuted at No. 2 on the Billboard 200 in May.

(Photo: Michael Buckner/Getty Images for Celebrity Fight Night)

Josh Groban on Kelly Clarkson ‘Phantom of the Opera’ Duet: 'Her Voice Could Do It All’

“When I was making this record, and we were going to record this song, I knew this duet had to be recorded in a very, very special way and it had to be recorded with a very special singer,” Groban said of Clarkson. “She is one of the most versatile singers that I’ve ever heard.”

Stages is a a collection of songs from Broadway musicals.

Watch above.