Girls' Generation members Taeyeon and Tiffany performed a duet on last week's KBS' "Music Bank."

SM Entertainment today shared the special stage performance of their duet track "Lost In Love" from their recent album for the first time on the show along with the group's "I Got a Boy" performance.

The song conveys the sad emotions after a break up. Taeyeon's deep, gentle vocals matching with Tiffany's colorful, impressive voice demonstrate an incredible harmony.

Watch their performance below.