WOW.
Yes, Miss Piggy is darn near impossible to draw... I have never attempted it, but I know many who have-- or maybe I just know a few and they complain really loudly, I dunno-- which is why I am so impressed with your rendition of her. True, the details aren't exact, but I LOVE that eye, and I do feel like you got a side of her personality that we don't often get to see.
I love Dr. Teeth, too, and the one of Link at MuppetVision 3-D makes me very happy.
Also... You do the coloring with PAINT? DUDE! It is darn near impossible to make ANY living thing look even REMOTELY good with that program! ! ! (And that's putting it mildly, folks, just in case you've never tried it.) I'm impressed. (And no, I have NOT wasted hours upon countless hours with Paint to the point that I know too much about it for my own good... <Shifty eyes>...)