The bikini doesn't lie and neither does the pictures that qwerty123 referred us to. So, it is obvious that Katy had some work done over the past two years. Now that Katy has been augmented with silicone, she would probably demolish the natural breast of Fergie in a titfight. However, Fergie is a toughie and has been known to be physically competitive so, despite the height and weight difference, I believe that Fergie would take the fight to the ground and pin her on her big boobs just as Katy's merchandising assistant did two years ago during an impromtu wrestling match that received national exposure.