If you tell us you have never sung along to a Taylor Swift song, we can honestly say you are a liar -- and that's exactly the presumption T. Swift and Diet Coke are making in her newest commercial for the soft drink.

The spot opens with Swift scribbling in her journal, then showing a man in his 20s or 30s driving along in his car, singing the words to '22' as Taylor is writing them. Showing the universal appeal of Swift, the clip then cuts to a short order cook singing the song along with a girl and her guitar and a group of merry-making karaoke patrons. The commercial ends with Taylor taking the stage with her guitar to the words 'Stay Extraordinary,' emblazoned on the screen. Taylor Swift is a woman of the people! Don't you forget it!