I was working on color keying the CMC’s gala dresses when I notices particularly in this shot how all three have predominant symbols on this ear decoration, and started to realize how close they could be to effective CMs:
 
Apple Bloom’s piece is very close to what a an apple blossom flower is:
 
Scootaloo’s is a dragonfly, which arguably describes how Scoots is able to move quickly with a similar fast wing-beating pattern via scooter.
 
The only one that’s not sure but isn’t so far out of reason is the flower for Sweetie Belle, it looks like a tulip to me (Though as convo below shows, its more like a bellflower) If anything, this still ascribes her creative side.
 
This could just be a tin-foil hat theory too :)