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In 2011, 44 albums reached number one on the weekly version of the Gaon Album Chart, a South Korean record chart that ranks the best-selling albums and EPs in South Korea. It is part of the Gaon Music Chart, which launched in February 2010. The data are compiled by the Ministry of Culture, Sports and Tourism and the Korea Music Content Industry Association, based upon weekly and monthly physical album sales by six major South Korean distributors. Girls' Generation (pictured), Big Bang and JYJ topped the chart with three different albums each, more than any other act. CNBLUE, Kim Hyun-joong and Super Junior each had two number one albums on the chart. The longest run at number one on the weekly chart was four weeks, by Girls' Generation's The Boys and Super Junior's Mr. Simple. On the monthly chart, TVXQ and Big Bang had the most number-one albums, with two each. Overall, Girls' Generation's The Boys was the Gaon Album Chart's best selling album of 2011. (Full list...)