• Seungri, G-Dragon, TOP, Taeyang and Daesung of Big Bang perform on the stage during a concert at the K-Collection In Seoul on March 11, 2012 in Seoul, South Korea.

Seungri, G-Dragon, TOP, Taeyang and Daesung of Big Bang perform on the stage during a concert at the K-Collection In Seoul on March 11, 2012 in Seoul, South Korea. (Photo : Getty Images/Chung Sung-Jun)

South Korean boy band, Big Bang, which was formed in 2006, celebrated its 10th-anniversary at the Seoul World Cup Stadium on Aug. 20, Saturday. Dubbed "O To 10," the anniversary concert was attended by more than 65,000 fans.

Much to everyone's cheers, the five-member group, G-Dragon, T.O.P, Taeyang, Seungri, and Daesung, showed up on stage at 7:30 PM (KST) and kicked off the special event with an epic performance of their first Japanese single, "My Heaven." Big Bang then climbed onto mobile miniature stages, circulating the stadium as they performed "Hands Up" and "We Like 2 Party."

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The 10th-anniversary concert, which was live-streamed in China's Tencent and Korea's Naver TV, was also attended by singer-songwriter, PSY, 38. The singer urged the audience to fist-thumping jumps with frenzied performances of "Champion" and internationally hit single, "Gangnam Style."

"I wonder if there has ever been a boy band that keeps developing with such a strong identity, confidence, and color," The Kpop Herald quoted PSY as saying before the 65,000 crowd. More than half of the 65,000 concertgoers was said to be overseas fans, provoking a 10 percent spike in hotel reservations in Myeong-dong, Jung-Gu, Seoul.

Appearing on stage in a blazing red velvet suit, G-Dragon put up an electric guitar-infused version of his solo debut album, "Heartbreaker." He and T.O.P then sang 2011's "High High," while riding around on Segway electric bikes.

"Since we had a lot of activities overseas, we had worried that we would not be as popular in Korea," All Kpop quoted G-Dragon as saying. "But seeing you all now, we're still popular."

Taeyang then humorously clowned that they would have extended the anniversary concert to two days if they had known that such a large number of people would come. The nearly three-hour "O To 10" special concert wrapped up with 2015's "Bae Bae" and "Always."

The "O To 10" special concert was one of the several projects that Big Bang planned to commemorate their 10th anniversary in the entertainment industry. On June 30, the five-member boy band released a film, titled "Big Bang Made," which follows their "Made World Tour 2015."

On Aug. 5, they opened an art exhibition in Seongsu-dong, Seoul, South Korea. The art exhibition, which showcases the history of the group, is open until Oct. 30. Check out the "Big Bang Made" film below: