Top 3 most popular k-pop group

1. Super junior

Super Junior (슈퍼주니어) is a twelve member (with two members currently on hiatus) Korean pop boy band under the SM Entertainment label and production agency. They are managed by producer Lee Soo Man and were the largest group under SM Entertainment for almost 7 years. They debuted in 2005 with the album SuperJunior05 (TWINS) as a twelve member group but added a thirteenth, Kyuhyun, in May of 2006 with the release of their single "U". In 2010 Chinese member Han Geng left the group, making Super Junior a twelve member group. Super Junior's popularity has spread across Asia and they have held concerts in such places as Taiwan, Thailand and Japan.

2. SNSD (Girls Generation)

Girls' Generation (Korean: 소녀시대; So Nyeo Shi Dae) is a South Koreangirl group formed by S.M. Entertainment in 2007.^[1] The nine member group consists of Taeyeon, Jessica, Sunny, Tiffany, Hyoyeon, Yuri, Sooyoung,Yoona and Seohyun. In Japan, they are known as Shoujo Jidai (Japanese; 少女時代).

The group gained attention at the beginning of their career with songs such as "Into the New World" and "Kissing You" but it was not until 2009 when they gained significant popularity with their hit single "Gee", which would be named as South Korea's "Song of the Decade".The group solidified their place in the Korean music industry with follow-up singles "Tell Me Your Wish", "Run Devil Run", and "Oh!" from late 2009 to early 2010. In 2011, after a series of activities in Japan, the group returned to the Korean music scene with "The Boys", which was released in three languages: Korean, Japanese, and for the first time, English. In 2010 alone, the group sold more than 11,730,000 digital albums and singles collectively.The group's immense popularity in their native South Korea has earned them titles "The Nation's Singers" and "The Nation's Girl Group".The Sisa Journal named the group as the most influential entertainers for the years 2011 and 2012, making them the first female idol group in history to make the list.^[6] They have also been listed as #1 on the Top Female Singer's list for 4 consecutive years in a row (sans 2nd half of 2011 at #2) on the Leespiar Popularity Survey in Korea.Asia Todayplaced the group at forty-four on the 50 Korean Power Leaders list in 2011.Forbes also revealed the group were most powerful entertainers in South Korea for the year of 2011.

The group began a foray into the Japanese music scene in late 2010 underNayutawave Records, with Japanese remakes of their 2009 Korean hits "Genie" and "Gee". The group's debut Japanese album, Girls' Generation, released in June 2011, is currently the highest selling album in Japan by a Korean group in Oricon history. It was certified "Million" by the Recording Industry Association of Japan, which made them the second Korean artist to earn such an achievement in Japan since label mate BoA's "Best of Soul" in 2005.^[10] The group followed up their success in Japan with their second album, Girls' Generation II ~Girls & Peace~.

They have expanded their reach in the Korean industry through their first sub-unit, Girls' Generation-TTS (known simply as "TaeTiSeo"), composed of members Taeyeon, Tiffany, and Seohyun. The subgroup's debut EP, Twinkle, peaked at #126 on the US Billboard 200, becoming the highest charting K-pop album on the chart thus far.

3. Bigbang

Big Bang or Bigbang (Korean: 빅뱅; stylized as BIGBANG) is a South Korean male group under the management of YG Entertainment. Formed in 2006, the group consists of G-Dragon, T.O.P, Taeyang, Daesung, and Seungri. Big Bang is known for their unique urban-originated music and fashion style. The members' involvement in composing and producing their own music, most notably leader G-Dragon, has earned the group respect and praise from music industry experts.