How can I get noticed?

My friends all wear very 'skimpy' clothes- short skirts, hot pants, even corsets for crying out loud!- when we go out together, but all I ever wear is jeans and t-shirts (occaisionally vest tops). I feel really self-consious about my body, I'm not fat, just average in every way. My friends always say how jealous they are of how cute i am, but i never get noticed because all the guys like them because they wear all these really y clothes and i just blend into the background. I dont want to dress like them because thats just not who i am, but i never get noticed and it makes me feel ugly and boring. I don't know how i can stand out without looking like a s**t.