Hollywood stars are known for having elaborate work done (and by work, we mean plastic surgery), but some of them have gone under the knife before turning 30. Pretty bizarre if you ask us. Ashlee Simpson, Kourtney Kardashian and Heidi Montag, aka the queen of plastic surgery, weren’t even 25 yet when they had procedures. And Kimberly Stewart got implants at the age of 18. I mean, they didn’t even have wrinkles yet and were already tweaking the way they looked. Check out the slideshow above to see 11 celebs who’ve had boob jobs, nose jobs, chin jobs and more before turning 30. You probably won’t even recognize them.