The biggest fake ones in the book of records are Maxi Mounds' naturals are Norma Stitz', I guess.
But everyone and their neighbours'dog knows biggest implants so far is Chelsea (fluctuating, of course, because of the drainage, but look at the recent snapshots. She IS living BE).
bottomline:
It's best to be a fan of all the big girls an not waste your time comparing who is 10 inches ahead.