I agree that all of Abby's dances are inappropriate for girls that age, but I also believe that they have reached the "single ladies" level.
When single ladies was performed, it was at a private competition and the video, just happen to be leaked. The teacher, the parents nor the girls ecxpected all of America to see that dance. To them, the dance wasn't inappropriate, because that is west coast dance...the west coast dance and costumes are just a little more risqué then the south or east coast dances are. With Abby, her girls are on national tv every week....she is trying to get a rise out of people with dances like this, not just doing what she think is best...Also, I do not believe this dance was well exctued and neither did the judges, because it showed in the results, but that JMO...