Lee Ji Eun or people generally known as IU is one of the most popular South Korean singer with hit songs like Marhsmallow, Boo, Nagging, Good Day, You & I, Last Fantasy, etc. Her stage name was derived from I & You, which symbolises togetherness between the singer and the fans. IU debuted on September 24, 2008 with her first mini-album, Lost and Found in which she was praised by various Korean artists for her strong vocals. On April 16, 2009 IU returned with her first full album titled Growing Up, with her title song being "Boo.