My high school's cheerleading team was ethnically diverse and well-dressed (i.e. no bare midriffs, cleavage, etc). That was a long time ago though; I started HS almost 20 years ago. Our cheerleaders didn't do many competitions and when they did they seemed content with their "Best Dressed" or "Most Spirit" awards. "Bring It On" it was not!
The way some of these girls dress nowadays is embarrassing, and those stunts are so dangerous. In the suburbs if girls aren't in gymnastics or competitive cheer by age 5 they have no chance of making their high school squad. It's pitiful.