By Ruth 66
Youth rules the singers, movie stars and athletes on the Forbes annual list of the Best-Paid Celebrities Under 30. These 20 young stars raked in a total of $690 million between May 2010 and May 2011.

18. Lil' Wayne, age 28, $15M

18. Carrie Underwood, age 28, $15M

17. Robert Pattinson, age 25, $20M

17. Kristen Stewert, age 21, $20M

16. Miley Cyrus, age 18, $15M

15. Maria Sharapova, age 24, $24M (tennis)

14.Carmello Anthony, age 27, $25M (NBA)

13. Dwayne Wade, age 29, $26M (NBA)

12. Dwight Howard, age 23, $28M (NBA)

11. Rihanna, age 23, $29M

10. Rafael Nadal, age 25, $31M (tennis) Youngest player to capture a career Grand Slam

9. Lionel Messi, age 23, $32M (soccer star from Spain)

8. Beyonce Knowles, age 29, $35M

7. Cristiano Ronaldo, age 26, $38M (soccer star from Madrid)

6. Katy Perry, age 26, $44M

5. Taylor Swift, age 21, $45M

4. Roger Federer, age 29, $47M He is no longer number one on the tennis court, but he still commands the most impressive endorsement portfolio in all of sports, with 10 major deals.

3. LeBron James, age 26, $48M His jersey was the NBA's top seller and he has the No. 1 basketball shoe on the market.
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strong>2. Justin Beiber, age 17, $53M He is the youngest on the list.

1. Lady Gaga, age 25, $90 Million