I know, this is totally off-topic, but you have to lend an ear to this.
A mashup is two songs taken apart and put back together into one song. This is the best mashup I have heard all year: Queen’s Don’t Stop Me Now with Mariah Carey’s All I Want For Christmas Is You. It’s weirdly wonderful, appropriately festive, and… well, just listen to it! It actually works! It sounds like an original song!