Sung Si Kyung,�Park Hyo Shin,�Lee Seok Hoon, Seo In Guk, and VIXX, the artists under Jellyfish Entertainment,�have�released their winter project, 'Heart Project'!

The project is designed to get you into a festive mood for the holidays and to make it perfect for gift giving,�it has been produced as a special gift set including the CD with the Christmas song "Because�It's Christmas", as well as a 2013 calendar, photocards, music video and making DVD, and a poster.

Check out the music video for "Because It's Christmas" below!