Popular boy band Big Bang is going to be lip synching for the first time since their debut. On the 15th of this month, Big Bang is going to be performing, on MBC "Music Core's" 100th episode, three of their own songs as well as two old school, hip-hop songs. They are going to be performing their three songs "Last Goodbye", "Lie", and "Crazy Dog" live. The old school songs they're going to be lip synching to are the Seo Taiji and Boys song "환ì�'ì†ì˜ ê·¸ë�'€" and Deux "나를 ë�'아봐". Fans are wondering why they are going to be lip synching these old school hits. Big Bang responded by saying that the choreograph takes so much energy, that it's almost impossible to sing at the same time. Regardless, Big Bang has been rehearsing for days; some would be dancing and some would be in the studio recording. Three members are going to be performing the Seo Taiji and Boys song, and the other two are going to be performing the Deux song. Big Bang has been at the number one spot for their hit song "Lie" for 8 weeks now on various music sites. They took the number one spot, once again, with their new single "Last Goodbye", and are at their prime right now. Check out all of the performances