'Single Ladies' girls; 'My Boyfriends Back' videoA very young precision dance troupe started quite a scandal last week when a YouTube video featuring a group of 7- and 8-year-old girls wearing midriff-baring tops and short skirts dancing to Beyonce's 'Single Ladies' hit the web. Although a World of Dance representative and the girls' own parents claimed the dance was "taken out of context," this isn't the first time these young dancers have caused a stir by acting grown up during dance competitions. Here, the girls perform 'My Boyfriend's Back' at the 2009 Hall of Fame Nationals: