 Their first live performance was at Mnet’s summer awards ceremony 20's Choice on July 7.Kim Hee-chul carried out his mandatory military service from September 1, 2011 to August 30, 2013.He served as a public service worker for 23 months after undergoing four weeks of basic training at the Nonsan military camp in Chungcheongnam-do.At the time of his enlistment, he was a host in the variety show "Secret", as well as one of the host of the talk show "Radio Star".