^^^21 lbs, based on what my son weighs and what he looks like. I breast fed my baby but he was never chubby. He was 5.10 when he was born, full term, so he is just small. But I would guess SP is in the 21 lbs range. He is an adorable, fat baby with cute chubby thighs.
Maybe you were just kidding because of the camera adds 10 lbs thing. If so, I didn't get it and please disregard this post.