Hehe, I like that mental image. "Haha, you slapped me. Hahaha, it hurts."
i like it, though to me it looks a bit like she's holding her cheek from being slapped :D
https://www.youtube.com/watch?v=AgXnLDxiM7w
The hand's a bit of a sore point but otherwise I love the animation, it does so much with relatively little motion.
@showtime: I am both proud and extremely embarassed that my silly, gross sketch partly inspired you to do this one. 
Love the AA. Agree that the hook hand needs to be fixed, but I also find it odd that the, well, derriere is completely motionless while the rest of the body is moving and all. Apart from that this is a perfect piece!
@CELS: Thanks for the comment that really made me laugh. I definitely wanted a bit of motion around the breasts, but not enough for it to be distracting!
BTW this piece was sort of inspired by a quick WIP sketch you posted in the Bait and Switch challenge thread. Your drawing of girls made me want to draw one.
@Stitchy: Thanks, I have now made the colour in question lighter. I think my mistake was finalizing the colours last night at 3am when I could no longer tell whether I was improving things or not.
Still gotta fix the hook hand though. The people have spoken and they do not like it!
@Mandrill: Thanks a lot, the leg was sort of a trial-and-error thing for me, I'm glad it came out ok.
Hehe, excellent. Reminds me of recent Disney stuff...
The facial expression and shading/colours are really good. It has just enough subtle jiggle to make it look believable.
+1 for anatomy (except the hands) and that moving leg. :)
Hey, thanks for the comment and thank you especially for the critique. I have other stuff to work on right now, but inbetween that I will definitely look at improving this. Just to clarify, is it the way the upper arm is drawn that you dislike, or that it is static?
This is very nice! Simple, but it communicates a lot, and has a ton of personality! ^^
I'm going to have to second Christoballs' suggestions, though. Her right hand looks a bit strange... maybe a pose where her hand is leaning farther back towards her wrist and the fingers curled a bit tighter would look better? As D-jinn pointed out, the shading in the hair is hard to see. I tried lightening the pink you used for the main body of her hair, and it worked just fine. ^^
This is really great! I'm impressed by how much character you've managed to achieve with so few pixels. It doesn't just look like a generic pixel art portrait.
Without seeing who pixelled this, I was fairly sure it was a girl. If it was a guy making this kind of looping animation on PJ, her breasts would have an extra vertical bounce of about 10 pixels. 
nice!. that AA looks awesome. the red AA at 1x can't be seen, or not for me.
I like this! 
However, I'm not too fond of the curled up hand and of the upper arm, and the supporting leg stands out from the rest. Perhaps you could move the static parts ever so slightly?
I like the way she enjoys my cheesy jokes!