Earlier in the month, it was confirmed that Jinusean, one of YG Entertainment's first artists, will be participating in the upcoming '15th Anniversary YG Family Concert'. Now, there's a rumor that old school YG Entertainment group 1TYM might also be performing at the concert. A netizen named sushilicious20 on tumblr recently found a set list up for the upcoming concert and discovered the name 1TYM under the list of artists performing: Since this was unannounced, many people are wondering if this is going to be a surprise performance of some sort. Additionally, YG Entertainment CEO Yang Hyun Suk was also listed under the list of artists performing. Before there was Big Bang, there was 1TYM. 1TYM was one of K-pop's most popular groups under YG Entertainment forming back in 1998, consisting of members Baekkyoung, Oh Jin Hwan, Danny (Taebin), and Teddy Park. they went on hiatus in 2006 as Oh Jin Hwan had to serve his mandatory military service. Baek Kyoung formed a temporary group named Moo Ga Dang and Taebin released his solo material in 2007. 1TYM leader Teddy Park was in the spotlight the most as he is now one of the top producers in Korea, producing almost all the hit tracks for YG Entertainment. The 15th Anniversary YG Family Concert will be held on December 3rd and 4th, and move to Japan in January, it's expected to draw in a total of 200,000 spectators. If the rumors are true, it will be a real treat for old school 1TYM fans. In the mean time, check out some of their best hits from the past below. Source + Image: sushilicious20 Tip: MehChan