Originally posted by Sandman_SBM
I think he means this one:

It is Jamie Pressly.
Yeah, that's her. It seems every time I'm watching a show, that commercial comes on and its been driving me crazy trying to figure out who she is. I figured she must be some sort of "B" list celebrity to land a major commercial gig, but I sure didn't know who she was.
Did a quick search on IMDB. She's done a bunch of movies, and I haven't seen any of them. That would explain why AT&T thinks she's a recognizable face, just like David Arquette.