Just bring what you usualy wear--your favorite jeans, skirts, shorts, tank tops..whatever! At night on the deck it can get a little chilly/and windy, so bring like a long sleeve shirt in case. But whatever you do, don't forget your bathing suit!! Oh and you will have formal nights (either 1 or 2--check ur itinerary) so you should bring something more formal like a cocktail dress.
Cool?!
Have fun!!
bring nothing....go naked.....lol. she basically said it all. depending on the cruise line you are going on you might have to dress up at night and not wear jeans or anything.