Taylor Swift Remixes

So I was just shown this amazing YouTube video. Personally, I enjoy music that crosses two genres into one. So to hear Taylor Swift and Usher mixed so well, I couldn't help but to share it on here. Check out the video:

This is one of those songs that I like to repeat... but, it also made me think of this other Taylor Swift video:

Yeah, that was a great video too! Reminds me of the Natalie Portman rap on SNL. But yeah, now I feel like this has turned from a 'check out this cool youtube video I found' to 'check out these Taylor Swift collaborations..." Cause yes, I've known of one more Taylor Swift mix, its an instrumental with Coldplay, sounds pretty good!

That's about all I know for Taylor Swift remixes/collaborations, if you know any, post them in the comments, I would like to see what you know of!