[3] On 27 September 2011, Kim released the single, "Breakups are So Like Me" which featured Heechul of boy band Super Junior, who also starred in the music video.Since Heechul enlisted for mandatory military service on 1 September, his parts during the performance on Music Bank and Show!Music Core, was filled in by bandmates, Yesung, Eunhyuk and Shindong, who performed with Kim.Kim is the #1 musician at University Campuses for 10 years and his popularity ranges from people in their teens to their 60s.[5] In 2014, Kim released, along with the girl group Crayon Pop, a new single titled "HERO".