The World Happiness 2010 Festival has just added a very special guest to its lineup; J-R&B legend Crystal Kay. And she isn’t alone! She’ll be performing as a part of a collaboration with the Yellow Magic Orchestra. The two first worked together back in April when they did a cover of the song “Thank You for Talkin’ to Me Africa” for the “commmons: schola vol.5 Yukihiro Takahashi & Haruomi Hosono Selections: Drums & Bass” album. Yellow Magic Orchestra chose Crystal Kay for the vocals on the song, but the two have never performed together before, so this is quite the treat for fans.