DJ DOC's member Kim Chang Ryul revealed a picture with singers Roy Kim and Ailee.

On October 8, Kim Chang Ryul posted on his Instagram, "Roy Kim and Ailee on 'Old School', join us" along with a picture.

In the picture, Kim Chang Ryul is peaking into the camera, trying to fit in, with Roy Kim and Ailee making V signs behind him. They are in the radio station.

Internet users who saw this commented, "Roy Kim got better-looking," "Kim Chang Ryul's neck must be hurting," and "Ailee got so much prettier after her diet."

Roy Kim released his new song Home on October 8 and Ailee released her new song "Don't Touch Me" on September 25.