"How pretty!" in English is Che carina! in Italian.
"Pretty female dog" in English is cagna carina in Italian.
fantabulo
"My pretty girl" in English means la mia bellina ragazzain Italian.
"The pretty bright one" in English is il luminoso grazioso in Italian.
Carine ragazze italiane
"Hi, pretty lady!" in English means Ciao, bella donna! in Italian.
bella
'Elegante' is pretty close!
giacca carina
bella bionda
"I think you're pretty" in English means Penso che sei carina in Italian.
very pretty: molto abbastanza (not to sure how you say it)