140819 Girls' Generation Yoona appears as a guest on Sunny's MBC FM4U's "FM Date" Radio

140819 Yoona visited Sunny to support her 100th broadcast for MBC FM4U's 'FM Date' Radio.

YoonA updated fans saying, "It has been such a long time since I got to roll around in my house during a break."  Sunny said when asked to reveal a secret of YoonA, "Her elbow skin is very stretchable."

YoonA revealed that TaeTiSeo were busily filming their reality program and said they will be making their comeback this year.