That's Lady Gaga from 2005, when, I guess, she was an unknown, average person in a restaurant.
It's a video that has a few clips of her on an MTV show from the time called "Boiling Point." I never heard of the show, but the premise apparently was to get on people's nerves and see if they could keep from losing their temper.
In this case they took her food and brought it back to her table with garbage on it. That would be a shocker.
She's very cute, I think. And five years ago isn't that long, from being unknown to being maybe the Number 1 artist in the whole world today. I love her songs and as far as I know I have them all.