Note: there's a chance that the "natural" side is also dyed - these pictures are used for visual purposes only.
1. Britney Spears
2. Miley Cyrus
3. Ashley Tisdale
4. Emma Stone
Emma Stone is actually a natural blonde! Whilst she does goes back to her blonde look every now and then, she has said that she prefers her red hair.
5. Leighton Meester
This fact shocks a lot of Gossip Girl lovers, as Leighton sports brunette hair throughout the entire show.
In an interview, Josh Schwartz revealed that Leighton initially auditioned for Blair with blonde hair but since her co-star, Blake Lively, already had blonde hair, she was asked to dye it brunette.
6. Olivia Wilde
7. Jennifer Lopez
JLo always looks stunning stunning regardless of her hair colour, because quite frankly, she pulls off ~any~ hair colour. But did you know that she's naturally a brunette?
8. Kate Hudson
10. Emilia Clarke
11. Sofia Vergara
Sofia is a natural blonde and has revealed that she dyed her hair brown to land more roles. She adds, "The moment I dyed my hair dark, it was, 'Oh, she's the hot Latin girl.' I loved it."