Lim Hyung Joo (born 7 May 1986) is a South Korean operatic pop (popera) tenor and classical crossover singer. He has sold more than 1.2 million (1,200,000) records worldwide, including over 1 million (1,000,000) in South Korea, and his total digital songs, singles and albums (including digital downloads, streaming and ringtone service) sold more than 10 million (10,000,000) units.