(January 15, 2015 - Source: Axelle/Bauer-Griffin) more pics like this »
5. Angelina Jolie
Where do we even begin with Angelina Jolie's activism? The causes she supports are numerous, perhaps most prominent among which is her role as UNHCR Goodwill Ambassador.

The actress, director, and philanthropist has put in the work for over 15 years (!), meeting and providing humanitarian relief for refugees of more than 20 countries in that time, including Tanzania, Cambodia, Syria, and Iraq. She's also received several awards for these efforts, including the Global Humanitarian Award by the United Nations.