Just a word of warning, Derpy's hair is not the same as Rainbow Dash's. It's got two spikes that slope down, not one spike that goes up. Compare this <a href="[link]"screencapture from the show with this fan-made animation. Dori-to got this wrong, too.
Yeah, except those are incorrect. It's a pretty easy mistake to make, and it took me a while to notice, too. But it's not the same. From the front it looks a little similar, but they don't use that angle much.