Gain

Son Ga-in (; born September 20, 1987), known mononymously as Gain, is a South Korean singer, actress and entertainer, best known as a member of the South Korean girl group Brown Eyed Girls. Having debuted with her home group earlier in 2006, Gain eventually made her solo debut in October 2010 with Step 2/4 to great commercial success, and has since released a total of six extended plays. In addition to her musical career, the singer also appeared in several native programs and series, most notably We Got Married and All My Love, where she co-starred alongside 2AM's Jo Kwon. Career 2005–2009: Brown Eyed Girls and solo projects Son Ga-In was noticed by the existing members of Brown Eyed Girls after she was eliminated during auditions for the popular South Korean reality series, Let's Coke Play! Battle Shinhwa! She was approached by composer Ahn Jung-hoon and invited to audition at Brown Eyed Girls' company, eventually joining the group. The four members performed several small shows before officially debuting as Brown Eyed Girls in 2006. In the same year, she performed a duet "Must Have Love" with SG Wannabe's leader Kim Yong-jun, which became her first number one hit during the Christmas season.