When you think of glamour, chances are a set of red-painted lips come to mind. And why wouldn't they? They're as much of a staple as the little black dress, and beloved by just about every celebrity you can think of. These days, red lipstick is as popular on the red carpet as it is at cocktail parties and after-work drinks — and as these models, actresses and singers show, there's no end to the slightly different iterations out there. Whether it's red with a hint of raspberry (hello, Emmy Rossum at the Elle Women in Hollywood Awards on Monday) or a strong pigment that leans toward orange (like on Amber Heard), it's bold, it's beautiful, it's womanly and it's unstoppable. Click through to see over 25 of our favourite celebs rocking red lipstick in its many forms!