The Wonder Girls who are actively promoting their second full-length album 'Wonder World' performed their song "Long, Long Time" for the very first time. At MBC TV's 'Beautiful Concert', lead vocals Sunye and Yenny performed their old school R&B duet track "Long, Long Time", showcasing their explosive vocal talent. Fans have been anxious to see them perform this song live, as it is one personally written by producer J.Y. Park who was more than satisfied with the way his disciples handled the song. The girls did not disappoint, and the five members continued to steal the hearts of the audience members after putting on their performance of "Girls Girls". Check out their performances below! Source & Image: TVReport via Nate