1 per week - Beyoncé live @ American Idol singing 1+1

The first choice for '1 per week' is a video from Beyoncé.
She is for me, one of the best, if not the best, female singer (a)live.

I don't know much about algebra, but I know 1 plus 1 equals 2. And it's me and you. That's all you have when the world is through.

A.