Ah, another subject very dear to my heart...
Good to see Scarlett in this thread; I agree, to my knowledge she is the Chelsea Charms of booty. There have been a couple of other fine examples, but a few too many small butts as far as I'm concerned.
Now, ladies and gentelemen, let me present you a single example of what I consider to be nothing less than the perfect female butt. Not the biggest, but quite large nonetheless and simply perfect in shape. Not just a butt,
the butt - the one and only - Kurvsgirl.
(So tough to choose just one picture...)