I'm a fan of Sunset Shimmer, despite the dissonance that might seem to imply with my massive Flutterfan status. As a result, I've become somewhat obsessed with attempting to perfect certain vector resources pertaining to her, such as her cutie mark here. The colors are as accurate as I can manage, and the shape was painstakingly achieved through a variety of official sources. Check 'em out if you want.
Inkscape SVG: [Link]
Plain SVG: [Link]
One of the better screenshots: [Link]
A shot of the packaging of her only pony toy: [Link]
Her cutie mark on her mask from that toy: [Link]
Find out more about Ponyscape at Ponyscape-Vectors
-------------------------My Little Pony: Equestria Girls™ and Sunset Shimmer™ property of Hasbro.