[1] In December 2011, Jellyfish Entertainment artists Sung Si-kyung, Brian Joo, Seo In-guk, Park Hak Ki, Park Jang Hyun and Hwang Project came together again for Jelly Christmas with the single "Christmas for All" (Korean: 모두에게 크리스마스).

[4][5] In December 2013, VIXX, Sung Si-kyung, Park Hyo-shin, Seo In-guk and Little Sister came together for Jelly Christmas 2013 with ”Winter Confession” (Korean: 겨울고백).

The music video for ”Winter Confession” features a story told in sand animation which give feelings of warmth and romance.

On December 15, 2015 Jellyfish Entertainment released their Jelly Christmas 2015 single album featuring the song, “Love In The Air” (Korean: 사랑난로).

[10] The music video features Jellyfish actress Kim Gyu-sun, who plays a young woman getting ready for Christmas Eve by recreating her childhood traditions.