Kim Yuna really does work with the best and after Big Bang, the figure skating queen meets the "emperor" Lee Seung Gi for another World Cup song collaboration. Having reported earlier that they were collaborating on a duet, their CF have been released on May 26th. Both Yuna and Seung Gi are models for KB Financial Group and were invited by them and SBS to sing for South Korea's success at the upcoming Fifa 2010 World Cup in South Africa. Although it might be a duet, they recorded their parts separately (only met to film the CF) and their voices were then mixed together during post-production. The duet is a remastering of the song Smile Boy from Seung Gi's 3rd album and they hope that it can cheer on the Taeguk Warriors to success this June. http://www.youtube.com/watch?v=W7sx8RxLsRI Many thanks to minjin for the information. [gallery]