Let's be honest, as long as she's not wearing pants, the guy will be happy. If she wears underwear (boy shorts are the best IMO), she can wear pretty much anything at all as a top and the guy will love it. Hell, you could wear boy shorts with a painting smock and I'd be happy.
i have a thing for booty shorts and if she's wearing one my tshirts. why do girls look good when they are wearing your shirts? I don't know, but your birthday suit would be sexy too since my birthday suit is always my pjs...unless I'm at a friends house or something that's just...weird