Do you like nightcore? I normally would just rather listen to J-core and other forms of Japanese EDM that nightcore seeks to replicate the aesthetic of, but some of the remixes are very nice. In the most extreme cases, they can make gold from shit. Some favorites:

https://www.youtube.com/watch?v=1TzYnfcxNNE
https://www.youtube.com/watch?v=R5RUvjCStTk
https://www.youtube.com/watch?v=KmDQuwJWs84 (this guy had a really good mix of "Numb" by Linkin Park but it looks like it got baleeted)
https://www.youtube.com/watch?v=QwdbFNGCkLw
https://www.youtube.com/watch?v=2ED8Bjf8fYg
https://www.youtube.com/watch?v=TiVIFMbwxOc