A detachable collar with a mirrored surface! Here is a lovely tutorial I stumbled upon. 

What you will need:

• Unwanted Shirt
• An old CD, or two, depending on how much surface you want to cover.
• Basin/Old Container that can fit the CD nicely. (You might want to throw this away when you're done)
• A Chopstick
• A pair of scissors (that you're, preferably, willing to part with)
•  Glue

 Instructions:

1. Cut out the collar from the shirt.
2. Place the CD into the container, and pour boiling water into the container. 
3. Wait for 1-2 minutes. (Go watch an advertisement, or two.)
4. Use the chopstick to remove the CD from the container.
5. Make sure the CD isn't hot enough to scald your hand, then use your scissors to cut the CD. Don't cut the CD all the way through!
6. Cut the CD out into angular shapes, then place them on your collar to see if you like it. (That photograph is not a good example! I think that it looks better when the pieces are smaller.)
7. When you're pleased with what you see, carefully glue the pieces on your collar.
8. TAA DAAAAH!

You could probably also try Lucinda's these prismatic shoes DIY or your own crazy interpretations. I would love to see the results, so mail me! :)

via aetienne