Brudder Mike is correct.
Probably Jenny and Chu Chu's breasts enhancement were done with better grade material and skill surgeon and therefore, more expensive. Therefore one needs to be experience to be able to detect them.
I used to be have a friend who is a cosmetic surgeon also told me that the nipples can be modified to make it looks attractive, pencil-eraser size, pointy and pink in colour!

My Surgeon friend said liposuction procedure, double eyelid eyes and breast enhancement operations are the most popular in Singapore. The most painful procedure on the face is a nose job operation. At least there is one WL in 54A who went thru' that.