Guys are a lot simpler than girls. Honestly the less you wear the sexier it is. Now if you are insisting on clothes, tight shirt, no bra, and wear those tight stretchy pants that really show your camel toe. No panties of course and you might even kinda tuck the pants in, if you know what I mean.
Each person is different,... whatever compliments YOUR body would be the best thing,... and also what you feel sexy in. If you feel like you look great in an outfit, that will radiate from your personality and people will notice.