Celebrities that work for a cause

10 Celebrity Supporters of Greenpeace

1. One Direction
2. Pamela Anderson
3. Penelope Cruz
4. Pink
5. Jude Law
6. Lily Cole
7. Bono
8. Paul McCartney
9. Dev Patel
10. Ezra Miller

7 Celebrity Supporters of The Nature Conservancy

1. Alec Baldwin
2. Blair Underwood
3. Isaac Mizrahi
4. Jessica Alba
5. Mena Suvari
6. Robin Wright
7. Sandra Oh

10 Celebrity Supporters of Alzheimer's Association

1. One Direction
2. Anne Hathaway
3. Ashley Tisdale
4. Kim Kardashian
5. Lady Gaga
6. Lea Michelle
7. Bradley Cooper
8. Mark Ruffalo
9. Kristen Bell
10. Rihanna

For more celebrities and the organizations they support, go to http://www.looktothestars.org/