A teaser video has been released for the upcominng 'Crazy Soul' concert, featuring singers Vibe, 4men, and Lee Young Hyun. The concert, which will take place in Kyunghee University from December 29th to 31st, is highly anticipated for its strong line-up of talents. Vibe is a two vocal group that is known for their exceptional singing talent while Lee Young Hyun is an ex-member of  an another talented group, Big Mama. 4men is a newer group that has been gaining a lot of attention for their good vocal skills as well. Those who saw the teaser video commented, "I'm looking forward to this concert a lot", "The best mix of talents", "They will end 2011 with a strong impression", and, "This concert will be full of such awesome talent." Check out the teaser below: Source + image via osen