The full guest lineup for '1N2D's upcoming 'Best Friend' special has been confirmed. Adding on to the previously revealed guest line up of Uhm Tae Woong's guest Lee Sun Kyun, Lee Seung Gi's guest Lee Suh Jin and Lee Soo Geun's soccer player guest Lee Geun Ho, two new guests have been revealed. Eun Ji Won's guest will be Lee Dong Gook and singer Jang Woo Hyuk who is known to be a good friend of Kim Jong Min will also be a guest on the show. An insider from KBS informed OSEN on the 9th, "The addition of Lee Dong Gook and Jang Woo Hyuk has rounded out the star-studded guest lineup. The five guests Lee Sun Kyun, Lee Suh Jin, Lee Geun Ho, Lee Dong Gook, and Jang Wook Hyuk are scheduled to join the show for the upcoming 'Best Friend' episode." Weekend Variety Show KBS 2TV 'Happy Sunday - 1 Night 2 Days' is preparing to air the 'Best Friend' episode as a new-year special. The filming will take place on the 16th and 17th, and the five cast members with the five guests will be taking a memorable vacation together. After Uhm Tae Woong, Lee Soo Geun and Lee Seung Gi revealed their guests first, viewers' were curious to know who Eun Ji Won and Kim Jong Min would be inviting on the show. Soccer player Lee Dong Gook and Eun Ji Won are actually brother-in-laws, as their wives are sisters. And singer Jang Woo Hyuk has been previously known to be a close friend of Kim Jong Min. There have been many memorable and hilarious '1N2D' specials in the past, but the 'Best Friend' episode will reportedly offer more laughs and entertainment to their loyal viewers. The first part of the special is scheduled to air January 8th, 2012. Source & Image: OSEN via Naver