On July 21 and 22, there will be an outdoor pool festival, "Green Groove Festival 2012" at Daecheon Beach with the Wonder Girls and famous singer Akon.

World hip-hop star icon, Akon featured for Wonder Girls new song, "Like Money". They also surprised their fans with his special appearance in their music video as well.

Akon will be with the Wonder Girls during their U.S. promotions as well. Fans are curious to see how their stage presence will be together at this festival.

Akon has sold over 15 million copies of his album worldwide and has beaten Lady Gaga as a hip-hop R&B musician. 

Aside from Akon, electro band Infected Mushroom and other international stars will be on stage with other national stars such as the top 4 from Mnet "Voice Korea."

Other artists are attending include 10 cm, Mighty Mouse, House Rules, Haha&Skull.

This is the 2nd year of the "Green Groove Festival" and is a environmentally friendly campaign concept. Every year, over 2 million people come from from all over the world to celebrate the festival with fireworks, good food and music.