I received the following video via email today:
The twisted thing is I have had this stuck in my head all day. So have the girls. There has been a lot of meowing around here.
So, I looked it up on Wikipedia. Apparently, this is a popular piece for sopranos, often performed as a humorous encore. Personally, I'm lovin' the two boys singing it, especially blond kid who is totally deadpan. Given his garb, deadpan makes it even better (in my humble opinion). Apart from the crazy cat business, their voices are stunning. I hope it makes you smile!