Credits as tagged
[Videos-1] Shenzhen Tongyi FM_20130906
Credit: leejoongjksj
The clips are he was rapping and singing the one sentence from Tongyi Juice CF (early version) see below, at the end of the CF, he said: Duo C Duo Piao Liang (more C more beauty)
[06.09.2013] Jang Keun Suk’s Weibo
Eels, ask me questions, quick, come come
장어들아 빨리 질문컴컴 어러어어여야뎌러도
Note: He took this picture right at FM on the stage and then he showed to lucky eels who won the lucky draw to get on stage with him. He said to them: I just posted this on weibo, I did it. Look! (see picture below, credit as tagged)