1. Katy Perry
2. Dwayne "The Rock" Johnson
4. Rihanna
6. Chiwetel Ejiofor
8. John Legend
9. Josh Hutcherson
10. Khloe Kardashian
11. Kim Kardashian
12. Kerry Washington
13. Taylor Swift
14. Geri Halliwell
15. Daniel Radcliffe
16. Idris Elba
17. Beyoncé
18. Victoria Beckham
19. Joss Stone
20. Kate Nash
21. Emma Watson
22. Hilary Duff
23. Zac Efron
24. Miley Cyrus
25. Lily Allen
26. The Jonas Brothers
*OK, this was a couple of years ago, but you get the idea.
27. Selena Gomez
Who knew then that she would become the queen of Instagram?