I thought it was Lindsey singing at the end of this ad.
Based on this thread, it sounds like Landslide has been strategically licensed out to make money (Budweiser commercial, One Tree Hill deal... Wasn't it also in a movie trailer for a movie about suffragists last year?), however I think this is a low for GYOW. I can't imagine Lindsey or whoever owns this track is making much money off of this commercial. And it makes the song sound bad!
Dying over the GO Your Own Way comment!