They were published in two different languages ​, Korean and Mandarin. A pop ballad with classical piano accompaniment, the single "Miracles in December" was written by Andreas Johansson Stone and Rick Hanley. However, the song was performed only four members of EXO: Baekhyun, D.O. and Chen recorded the Korean version, while at the same time Baekhyun , Chen and Luhan they recorded the Chinese version. Special performances of the four members (Baekhyun, D.O., Chen and Luhan) and Lay on the piano, performed often the song on music programs live for television as "Inkigayo" and "Music Bank".