Kwangsoo's heart for Girls' Generation's Yuri...

Running Man EP 63. 2011.10.02 RUNNINGMAN 奔跑吧兄弟
Yoo Jae-seok, Ji Suk-jin, Kim Jong-guk, Haha, Gary, Lee Kwang-soo, Song Joong-ki, Jeon So-min, Song Ji-hyo, Yang Se-chan