Last summer, the My Little Pony Fair hosted a costume parade and contest where Fair attendees dressed up in pony themed outfits and strutted their stuff. I really enjoyed watching this event and can't wait to see what our participants will come up with this year!
If you are looking for a pony themed wig, check out Head Kandi by Cyber Falls. They currently have Applejack, Rarity, and Big Macintosh wigs, but accept custom orders as well. Fun stuff!