Hilary #1 on 100 Celebs Under 25

1. Hilary Duff

2. Amanda Seyfried
3. Lauren Conrad
4. Megan Fox
5. Scarlett Johansson
6. Amanda Bynes
7. Joe Jonas
8. Kristen Stewart
9. Blake Lively
10. Julianne Hough
11. Zac Efron
12. Whitney Port
13. Audrina Patridge
14. Hayden Panettiere
15. Ashley Tisdale
16. Ashlee Simpson
17. Taylor Swift
18. Vanessa Hudgens
19. Keira Knightley
20. Mandy Moore
Source: aim.com