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