* Piękna dziewczyna: This is the most common and straightforward translation.
* Śliczna dziewczyna: This implies a cuter or more charming kind of beauty.
* Urocza dziewczyna: This means "charming girl," but it often implies beauty as well.
* Krasna dziewczyna: This is a more old-fashioned or literary way of saying "beautiful girl."
So, in most cases, Piękna dziewczyna is your best bet.