Some of you people in this thread are misinformed and ridiculous. Matt Nathanson is a very well known artist, and a very accomplished writer. Sure he's nowhere near as famous as Taylor Swift, but he's also not a sexy beauty queen with millions of dollars promoting him. That being said, I would still marry Taylor Swift like 8 times.
that's not the problem here. he can be famous, and even be an awesome musician, but getting worked up over one line in a song?
were the melodies the same too? pop music recycles both lyrics and melodies continuously over time but no one cares then, even with recycled lyrics, a pop song can still be great.