Singers Kangta and Lee Ji Hoon revealed a picture with Girls' Generation's member Hyoyeon.

On Feb. 17, Kangta posted on his Twitter, "'Immortal Song' challenge! With Hyoyeon" along with a picture.

In the picture, Kangta, Lee Ji Hoon, and Hyoyeon are posing for the camera together. The three are showing natural 'chemistry' like one team, catching much attention.

Internet users who saw this commented, "It's been a while", "Hyoyeon looks so pretty" and "So excited for your stage."

KBS 2TV entertainment program "Immortal Song" airs every Saturday night.