Lady Gaga has been sidelined with a hip injury most of the year, but she's still one of the most powerful celebrities in the world.

Here's the top ten:

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1. Oprah Winfrey

2. Lady Gaga

3. Steven Spielberg

4. Beyonce

5. Madonna

6. Taylor Swift

7. Bon Jovi

8. Roger Federer

9. Justin Bieber

10. Ellen Degeneres

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The list is based on estimated earnings, marketability and how often a celebrity is mentioned in print, on TV and in social media. Saints quarterback Drew Brees is #50.