How Many Plastic Surgeries Can You Have Before You Start to Look Fake?

We've all seen people who look terribly fake after multiple plastic surgeries... How many plastic surgeries can you have before you look fake (considering you've had 'natural-looking' surgeries)? See the photo... He looks almost too perfect, and over-done Do you see what I mean? Also, can you have plastic surgeries that are not so perfect to make it look like you didn't have plastic surgery? thanks!