[ChanMi's star news] Gong Yoo's cell phone commercial Published on 2010/07/30 | Source AdvertisementGong Yoo and Sulli of girl group f(x) each showed off their charm.They shot a commercial for a cell phone together. In the commercial, Gong makes a move on Choi. Through this commercial, Choi was able to show a mature image. "Always" />