South Korea’s Wonder Girls are a 4-member female group which debuted in 2007. Two years later, WG became the first South Korean group to enter the U.S. Billboard Hot 100 thanks to the super catchy song “Nobody”. The girls have released a new single which brings some reggae vibes into K-pop. The track is “Why So Lonely” and it has hit #1 on the charts in South Korea. Have a listen below. Wonder Girls’ fourth studio album is in the works.