I'm not sure, but you can see more of her if you change the last number
http://www.freekickassmovies.com/big_butts_like_it_big/2009-02-23/index01.htm
thru
http://www.freekickassmovies.com/big_butts_like_it_big/2009-02-23/index09.htm
Biggest ass, I don't have one. But as for best...
This one is hot as hell:
http://free.atxnetwork.com/atx/vero4/2/?nats=design:rebill:atxnetwork,0,0,0,1777