In theese days, some teens have really... "Original" fashion styles: crazy socks, short trousers, colorful shoes, very high heels, and so on
But most of the teens like to have a casual style. Many say that "comfortable" is more important than "beautiful". A cool t-shirt, some blue jeans, a cardigan(if it's cold outside) and a pair of comfortable shoes are all you need to look nice.
Sper ca e ok ;)