It depends. Teenagers who are bold or daring will choose to wear mini-skirts, mini-shorts, tank tops, short dresses, spaghetti tops, tubes for girls. For boys, they will choose to wear loud pieces of clothing.
For classy teenagers, they would wear dresses, high heels for girls and casual-formal button up shirts for boys.
For teenagers who does not really mind what they look, they will just put on t-shirts and shorts or jeans.
Yes, teenagers still wear capris in 2011.
It is not normal for teenagers to wear diapers if they don't have a medical issue.
The overwhelming majority of teenagers don't love to wear diapers. Why a few would prefer to do that you'd have to ask them.
that teenagers have started to wear their trousers properly
nothing but cheetah man thongs, and dental floss
once you reach womanhood (the start of your monthly cycle) many teenage girls start to wear burkas