8. George Clooney
In 2010, George Clooney organized the Hope for Haiti telethon to help the victims of the Haiti earthquake. With his star power, he managed to rope in superstars such as Madonna, Beyoncé, Julia Roberts and Leonardo DiCaprio. Pulling in $61 million, the telethon was the most successful on record. George Clooney has a long list of other humanitarian efforts on his resume, Not on Our Watch, Clothes Off Our Back, Feeding America and Make Poverty History among them.