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.