During that Royal Wedding event in Culver City a few days ago, they brought Brooke Burke from Modern Mom and Dancing with the Stars to replace Tori Spelling for the day. It looks like they are way into it, and running a full on Twitter party this Thursday!
If you want to join in, all you need to do is follow ModernMom, and and toss a #ponywedding out between 1-2:00 PM PST on the 19th of April. Everyone that joins is entered to win one of 6 My Little Pony Prize Packs, which include a Friendship Express train set and a few other goodies. The grand prize will receive is a Sony Bloggie.
Check out their website here for status updates over the next few days!