Meow! 16 Catty Stars Flash Their Fiercest Faces

Don't mess with a celebrity who is completely fed up! Check out these moments when they were not ready for their close-ups.

Don't mess with a celebrity who is completely fed up! Check out these moments when they were not ready for their close-ups.

1. Nobody messes with Mila Kunis! The actress set her face in a snarl while posing recently on the red carpet.

2. Kate Middleton shows just how royally peeved she is with a penetrating glare.

3. Read Natalie Portman's curled lip — she is not happy.

4. She's rumored to have a great sense of humor, but Victoria Beckham often spices up her image with an open mouthed pout.

5. Don't even try keeping up with Khloé Kardashian when she's in a mood.

6. Scott Disick sometimes gets so smug it looks like he wants to smack whoever crosses him or his wife, Kourtney Kardashian.

7. Kanye West and his oversized ego are clearly not amused by the masses. Ever.

8. Judging from his glare, there's a good reason Neil Patrick Harris scored the starring role in the Broadway musical Hedwig and the Angry Inch. Now back off!

9. Leonardo DiCaprio is a big star with a big frown. Constantly being surrounded by models must be tough.

10. Nothing would please Justin Bieber more than one less lonely girl screaming in his ear.

11. You know there's something seriously wrong when Kim Kardashian is baring her breasts but isn't happy to see photographers.

12. Scarlett Johansson has a way of making it crystal clear that she's just witnessed the Dumbest. Thing. Ever.

13. Twilight star Kristen Stewart is much better at throwing shade than acting all sunny.

14. Six rambunctious kids running around at home can steal the smile from even Angelina Jolie's face.

15. January Jones proves there are mad men and mad women.

16. Whatever Paris Hilton is looking at, it’s NOT hot.