Blue faded skinny jeans
Most Helpful Girl
Raggedy/faded/ripped/any other sort of "worn" look jeans go well with a clean-looking top. Opposites balance each other out.
I'd do a white collared shirt or something conservative (avoid hardware) w/accents or ruffles if it were me. Throw a nice leather jacket or blazer over it and you're good to go for damn near anywhere.
Next time, post the occasion so we can give you more specific advice.1