Korean singer-songwriter Rain officially released his new song "The Best Present." The singer-actor visited SBS CultTwo Show and promoted his new project on Jan. 16. The Best Present is Rain's comeback project after four years.

Amid his unparalleled songwriting skills, the singer surprised his fans when he confessed that he is not the one who originally made the song. He revealed that it was Psy's great mind that was behind his new single.

"At first, he just gave me some songs, but then he started to comment on my choreography, entertainment, schedule, and so on...calling me every day to work out my schedule," said Rain as quoted by allkpop.

"He told me to let others know he wrote the lyrics and composed the song himself. When I first heard the song it wasn't really appealing...Psy and I have different tastes in music," added Rain.

"The Best Present" is a collaborative masterpiece of Rain and Psy, with a touch of Gangnam Style and smooth ballad. The music video is performed by Rain doing his famous Michael Jackson moves while performing sleek choreography.

On his Instagram, the ballad singer revealed through a handwritten letter post that the lyrics "she's the greatest present of all" is an ode he wants to dedicate to his girlfriend, Korean actress Kim Tae Hee. The two will tie a knot next month.

Psy also revealed on Twitter explaining that the song's chorus symbolizes Kim described as the biggest joy. In the making of the song, Rain asked Psy to include the term, as it is a reference to the hanja (Chinese characters used in Korean) for big joy, which can be read as Tae Hee. It is really indeed "The Best Present" of Psy to Rain.