16. Kourtney Kardashian
In true Kardashian style, Kourtney got breasts implants while in college, because she just got the idea into her head one day. She found a doctor, and at the age of 22 she went ahead and got it done without any research or planning beforehand. She says she was lucky to have a great experience, but if she had taken the time to look into it, she probably would have decided against the surgery.