I think we'll be seeing more of Kurt Hugo Schneider. This is some talented stuff. It's not so much a mashup as Taylor Swift songs in a blender -- and it's wonderful! I've never seen someone do this to an artist's body of work and have it come out great.
I think it's likely because Taylor's "hooks" and earworms are very short, so it's easy to snippet them together. I don't know, but you've got to see this: