there is an art form to remixing a song....

some remixers enhance the song in many different ways and its doesn't necessary mean that its better than the original - just extended, different or indeed sonically better due to better production or mastering.

please add to the list of remixes that you class as perfection:

Ellie Goulding has so many many wonderful remixes her entire second album (before the re-release) was remixed and is utter perfection http://www.youtube.com/watch?v=0BxNOzuhdlg. Aswell as Starry eyes Russell chimes gives it a great house makeover.

Some of my favourites:

Britney Spears - I'm Not A Girl, Not Yet A Woman (Metro Remix)
https://www.youtube.com/watch?v=DZjy7x5ERxo

Britney Spears - Piece of Me (Bimbo Jones remix)
https://www.youtube.com/watch?v=1igvlx2pC_c

Britney Spears - (You Drive Me) Crazy (Stop Remix - the single version)
https://www.youtube.com/watch?v=Q4VK9_CfOLQ -> I prefer it to the album version

Britney Spears - Boys (Co-Ed Remix)
https://www.youtube.com/watch?v=s25OMP4Ww6Y

Yeah Yeah Yeahs - Heads Will Roll (A-Trak Remix)
https://www.youtube.com/watch?v=O3c4dPxN1qM

The Saturdays - Missing You (Cahill Remix)
https://www.youtube.com/watch?v=RUqtq4P_kf0

The Saturdays - Up (OLM's Main Intersection Radio Edit)
https://www.youtube.com/watch?v=sTdYapWslR4