"Walk a mile in somepony else's horseshoes."

Some ponies take that a little too far sometimes. Like Vinyl and Octavia. After a strange coincidental meeting, and a magical mishap, the hyperactive DJ and sophisticated, classy, musician switch bodies... which normally wouldn't be a problem, if they both didn't have a potentially life-changing event coming up on the same day a week from now.

Hopefully they can get their act together.

But they probably won't.