Who sings "carry on" in Sony TV commercial?


This is a female singer singing Crosby, Stills, Nash & Youngs song.
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Maybe it was produced specifically for the commercial and is a no-name artist. We probably need to hunt down the approrpriate Sony ad agency.
The closest i have gotten is at http://www.songtitle.info
They have every other one imaginable. That must be a really new commercial.
I found songtitle.info too along with a suprising selection of search engines regarding commercials. No luck yet. I wrote Sony and got no where, I have a couple e-mails into some search engines looking for help. I think the best way may be to find out who handles the Sony advertising account.