South Korean pop star Psy's Gentleman, a follow-up to his global hit Gangnam Style, has already reached 18 million views on YouTube.

The music video shows Psy in his trademark sunglasses and suits, and his signature horse-riding dance from Gangnam Style is replaced with a pelvic thrust apparently known as the arrogant dance. Psy is portrayed as nothing close to a gentleman and is seen taking off girls' bikini tops, pulling a chair from under one woman and making another fall off a treadmill.

The 35-year-old rapper performed the song live for the first time in front of 50,000 fans, who were dressed in white as Psy had requested, at Seoul's World Cup Stadium. The show was also streamed live on the internet and nearly 160,000 tuned in to see it.

The Gangnam Style video is the most watched ever on YouTube with more than 1.5 billion hits, and the dance craze also entered popular culture with UN Secretary-General Ban Ki-moon and Chinese artist Ai Weiwei both attempting to copy Psy's creation.

"Of course I feel more burden than before because lots of people are watching," he told during a news conference ahead of the concert, "(Today's show) is a performance of thanks for the Gangnam Style success."

Psy also hoped that his global success would help cool down the political conflicts between the two Koreas.

"It's a tragedy. We are the only countries divided right now," Psy said, "Hopefully my Gangnam Style, my Gentleman, my music videos and my choreography ... they might enjoy them too."

Scroll down to take a look at the concert pictures...

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium.Reuters
South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium.Reuters
South Korean rapper Psy (C) performs during his concert "Happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene.Reuters
South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium.Reuters
South Korean rapper PsyReuters