Rainbow Dash saves the world again!
Tried an different technique on this vectorization, using no outlines. Also, did some changes from the original frame, because the reference image was a little blurry, and I couldn't see some details.
Thanks to ~SeriousArthos
for the idea and the frame captures!
Also, Windows creates some artifacts using this image as wallpaper, so try resizing it with another program to your resolution and then using that as wallpaper.
From Season 3, Episode 6, "Sleepless in Ponyville".
Made in Inkscape.