My Little Pony: Friendship is Magic - Trixie reference in S3 E13, Canterlot ~18 min

Sorry for double posting, had to go dig up the images:

Family Appreciation Day: Canterlot – Pre-ponyville


A Canterlot Wedding Part 2: Canterlot – Sonic Rainboom



Don't really think it's a reference, I think The Best Night Ever vector just looked plain to someone.

@Crazy
It has the same color and shape as trixies hat and has the same symbols.