Leighton Meester's Hair and Makeup Looks Over the Years

When it comes to switching up her look and experimenting with bold makeup shades, Leighton Meester is the queen bee. The actress, singer and designer muse is a pro at playing with colour, crafting unconventional beauty looks and setting trends. Leighton loves to have fun with her makeup and is totally fearless when it comes to walking the red carpet. In honour of her 25th birthday, which she celebrated over the weekend, here's a look back at Leighton's beauty evolution . . .