Yun Hye-yong was a singer with the Pochonbo Electronic Ensemble, a North Korean orchestra. In May 2009, according to the Chosun Ilbo, author Chang Jin-song published a poem, "Kim Jong-il's Last Woman", in which it was alleged that Yun was a mistress of Kim Jong-il. The authenticity of this claim remains unclear. This poem was first published online in Ekleksographia, no. 2 (2010).