on Hey!Hey!Hey! that aired this evening, 120709, Tohoshinki are present as well as their hoobae, SJJD/Girls' Generation.

On the talk session, Tohoshinki talk about SJJD. I could hear Changmin mentions Seohyun's name.

Changmin: “When we were in highchool, SNSD are just elementaries or juniorhighschool, and now we hear Maknae Seohyun saying let’s go drink. They’ve really grown.”

and here's the link..

https://www.youtube.com/watch?v=_MSpDXbdT7c&feature=relmfu