4. Scarlett Johansson
Scarlett Johansson is best known as an actress, but she’s also very involved in giving back. Johansson spent time serving food to victims of Hurricane Katrina and visited Rawanda in 2008 attending RED AIDS conferences and helping to educate people about AIDS. In addition, Scarlett Johansson has been involved with World Vision, Feeding America, Oxfam, and Clothes Off Our Back.