South Korean girl group Wonder Girls performs during the MTV World Stage Live in Malaysia in Petaling Jaya near Kuala Lumpur on July 31, 2010. The group just kicked off a three-month Asian tour.

(Relaxnews) – South Korean girl group Wonder Girls launched an Asian tour on Saturday, one which will see the girl group perform in five countries over the next three months.

The Korean record label and manager of the Wonder Girls, JYP Entertainment, told website Kpopstarz that some 4,000 fans attended the kick-off concert of the Asian Wonder World Tour, which was held at the Resorts World Sentosa Singapore. This is the second Asian tour for the girl group, which last embarked on an Asian series of concerts in 2007.

Opening the concert was the duo JJ Project, followed by the Wonder Girls, who performed their favorite hits such as “So Hot,” “The DJ is Mine” and “Like This” over the next two hours.

After Singapore, the Wonder World Tour will head to Malaysia on September 13 and Indonesia on November 3, followed by Thailand and Vietnam at the end of November.

The Wonder Girls are made up of five members: Kim Yubin, Park Yeeun, Min Sunye, Ahn Sohee, and Woo Hyelim. The group was one of the pioneers of the K-pop invasion in the US when they opened for the Jonas Brothers in 2009 and Justin Bieber’s Valentine’s Day concert in Los Angeles in 2010.

K-pop goes international

The Wonder Girls were one of the first South Korean pop bands to make a splash on the international music scene with their smash hit “Nobody” in 2008. Another successful South Korean group is Girls’ Generation, a nine-member group with two Korean-American members and whose Facebook page has 3.5 million fans. The group appeared on The Late Show with David Letterman earlier this year, setting the stage for future appearances by other K-pop stars.

The latest success is fellow South Korean artiste Psy, whose “Gangnam Style” has garnered over 135 million hits on YouTube since July 2012, after being one of the channel’s most-viewed videos for weeks. He has since gone on to sign a record deal with Universal Music Group under the wing of Scooter Braun, Justin Bieber’s manager.

According to Arirang TV’s website Sunday, the total revenue generated by the K-pop music industry reached some USD$3.4 billion dollars in 2011, based on figures from the Korea Creative Content Agency.Billboard magazine even has a K-pop Hot 100 chart to follow and rank the most popular K-pop songs from download and streaming websites.