It's a Cutie Mark Crusader...
Cutie Mark Record Riders YAY! The CMC stole one of Vinyl Scratch's DJ set to see if they could get their cutie marks for uh... spinning around? Yea.. sounds legit. (The cutie mark for spinning is a pony spinning on a DJ set... which has a cutie mark of a pony spinning on a DJ set... which has... you get the idea)
I made this one a bit larger because the other DJ table could not fit 3 ponies too well... total number of frames is up to 12 now.
This is based on original artwork/lineart/animation done by the wonderful: