Found this project in the craft book "Best Friends Forever!" by Laura Torres. This is a really cute project that you can do with the leftovers of your other jeans crafts. =)
I know I said that this project only takes 5 min. , but that's if you're using hot glue. If you use craft glue, you'll have to tack on a little drying time. ;) (ok, that was kinda obviouse...)
Cut a belt-loop off a pair of jeans.
Glue it to the barrette using hot-glue or strong craft glue.
Add a little shimmer with sparkle nail polish if you want. *^.^*
Wear it and wait for the complements and "oh-my-gosh-did-you-make-that"s to start rolling in. =D