1. Ariana Grande
At age 16 and age 21.
At age 16 and age 21.
At age 16 and age 21.
2. Hilary Duff
At age 14 and age 26.
At age 14 and age 26.
At age 14 and age 26.
3. Justin Bieber
At age 15 and age 20.
At age 15 and age 20.
At age 15 and age 20.
4. Selena Gomez
At age 15 and age 22.
At age 15 and age 22.
At age 15 and age 22.
5. Demi Lovato
At age 16 and age 22.
At age 16 and age 22.
At age 16 and age 22.
6. Nick Jonas
At age 15 and age 21.
At age 15 and age 21.
At age 15 and age 21.
7. Miley Cyrus
At age 14 and age 21.
At age 14 and age 21.
At age 14 and age 21.
8. Taylor Swift
At age 16 and age 24.
At age 16 and age 24.
At age 16 and age 24.
9. Rihanna
At age 17 and age 26.
At age 17 and age 26.
At age 17 and age 26.
10. Robyn
At age 16 and age 33.
At age 16 and age 33.
At age 16 and age 33.
11. Christina Aguilera
At age 19 and at age 33.
At age 19 and at age 33.
At age 19 and at age 33.
12. Isaac Hanson
At age 17 and age 32.
Dang, Isaac. Dang.
At age 17 and age 32.
Dang, Isaac. Dang.
At age 17 and age 32.
Dang, Isaac. Dang.