Rebecca Shoichet is the melodious and lovely singing voice of everyone's favorite egghead Twilight Sparkle AND the voice of Twilight's EQG rival Sunset Shimmer. She was a guest at BronyCan this past weekend and I was asked to make an autograph card for her signing table.
Here's Twilight and Sunset Shimmer mending fences over karaoke!
Over at Derpibooru, it was pointed out that Sunset's magic is a teal color, not green. Every screenshot I found for reference looked green, which seemed nicely appropo given the whole envy thing. But if its teal, it's teal. And the more I type the word teal the more it looks and sounds like a made up word.