Many thanks to the talented DJDelta0 for sharing two piano arrangements of pony music. The first is BBBFF, which you can listen to in the embedded video. DJDelta0 brilliantly captures the energy and emotion from one of this season's most charming songs. The second arrangement is for This Day Aria, and it is just as beautiful.
The sheet music for BBBFF is here, and here is the music for This Day Aria. Both are hosted on Noteflight.
By the way, did you know Everpony Sings' birthday is coming up on May 18th? I think that's pretty freakin' awesome.