In 2009, her agency (CCM) CEO suggested her to switch to become a solo trot singer, a suggestion she initially resisted given her young age, as trot is regarded as an "older" genre of music in Korea. Nonetheless, she released her first digital single, "Love Battery" (사랑의 배터리). On August 6, 2010, she returned with a new digital single entitled, "My Love". On June 30, 2011, Hong along with many of South Korea's rising stars sang at the Changwon Sports Complex in a concert called "Changwon's First Anniversary Hope Concert, We Are". On March 22, 2013, she returned with the release of the digital single, "Boogie Man" (부기맨). During the year of 2014 she had parted ways from Core Contents Media alongside Davichi.