The only Pixelate effects I know of just multiply the pixels and fill them with the nearest color in their range, or actually create more pixels to fully preserve and 'stretch' the picture. If you pixelated it with an effect, you would've aligned the colors in the original pic pretty damn perfect.

Either way, I like how that picture came out. And the first one has a funny theme and expression I never before related to Jazz (I have dreams about my schooldays regulary, btw).

I'm sorry to say though, that the drawing style of the first pic reminds me of My Little Pony, may you be the one who decide whether that's a good thing or not.