16. Harry Styles – 22
This singer is definitely starting to put more years on him than he has any right to. He was once the heartthrob of many girls, and while they still might be lining up, they are likely to be disappointed by their up-close look. The singer looks much older than the 22 years that he has lived. At least he still has plenty of money and talent to get him through the tragedy of looking old before his time.