[PHOTO] The Wonder Girls practice in U.S.

From left, the Wonder Girls members Yubin, Yenny, Mimi and Sun monitor themselves on a video camera after practicing for their performance. "After hours of practice, they check if they are in sync!" the girls wrote in a photograph posted on their official Twitter page (twitter.com/followWG) on September 30, 2009.

"PRACTICE MAKES PERFECT! Practice, Practice, Practice" wrote the girls under a photo where they are seen practicing at a rehearsing studio. The Wonder Girls, who have been opening for the Jonas Brothers' tour since June, posted the photo on their official Twitter page (twitter.com/followWG) on September 30, 2009.

Jessica Kim jesskim@asiae.co.kr