The 100th Episode of MLP!!

I am so Fangirling right now!!!! For those who may not know, the 100th episode of MLP will be featuring Background ponies ! I just saw 2 clips and its going to include the following background ponies!!!!
Background Ponies that I saw in the clips: Octavia, Vinyl Scratch, I think I saw Button Smash, and the one I'm most excited for......(drum roll for dramatic effect)..............Derpy and The Doctor(or Time Turner however you prefer!), I can't wait to see this episode!!!!