SM Entertainment's ballad project 'SM THE BALLAD' Girls' Generation's Taeyeon and SHINee's Jonghyun performed a duet stage.

Today, 'SM THE BALLAD' Taeyeon and Jonghyun performed their duet song "Breath" at MBC "Show! Music Core".

"Breath" is a duet song that describes the silence that rings during a phone call after a breakup.

Photo Credit: MBC