Teen halloween costumes?

okay yall im goin to carowinds halloween haunt and the people im goin with wanna dress up so i obliged 2 do so 2 oooh big word lol. but anywho i need a good teenage costume im not super fat but im definately not skinny so i dont want a super skimpy one but a little y is alrite. plzzz help caus for real i need some opinions. thx :):)