I don't mean to be a Glee stan, but if you watch the video, it's very clear that the joke isn't that someone is parodying Single Ladies. The joke is that the flamboyantly gay kid and his friends are imitating Single Ladies and got caught. Nowhere is there any sense of originality in the idea of someone besides Beyonce dancing her (inherently un-original) routine.
The point is that the cute little gay kid is imitating many, many gay kids before him, and his redneck dad realizes that.
"Why, I make more money than... than... than Calvin Coolidge! PUT TOGETHER!"
~Lina Lamont
My name wasn't, isn't, and will never be Scott.