SNSD's Taeyeon, Tiffany, and Jessica will be guesting on an upcoming episode of 'Radio Star'. This episode is a 'musical stars' special, and so Taeyeon, Tiffany, and Jessica were invited due to their experience with musicals. They'll be joined by Park Hye Mi and Lim Tae Kyung. A source from the set revealed, "The atmosphere on set was good because of the unexpected amount of laughter that broke out... SNSD was great, as well as Park Hye Mi, who's known for her witty comments. Lim Tae Kyung proved to be a tough rival as well." This episode will air on November 9th. Source + Photo: Star News