How do you get your teeth like Sparkly Bright White Pearls w/o having to buy the expensive stuff?

Okay my teeth aren't like er or Cheese (ewww I grossed myself out) they're white but I want them movie star bright white teeth, I even kind of stopped drinking coffee (I'm addicted to that stuff) but yeah I would appreciate the advice and natural stuff is a plus I can't really buy the expensive dental stuff because I'm more broke than a hobo..