That Xfinity commercial's "ginormous celebrity"

Factual Questions
1

I hate to admit just how out of it I am these days, but that “ginormous celebrity” doing commercials for Xfinity – who the hell is she?

2

Jane Lynch from “Glee”.

3

And “Best In Show”, and “A Mighty Wind”, and about a billion TV and film guest star roles.

4

And, as she is a very funny person, I am certain an element of “Who the fuck are you?” is a part of the joke.