Have you ever wondered who our nation's top black celebrity philanthropists are? Many African American celebrities give of their personal fortunes, along with their time and talent to improve the world. Some give quietly, while others have created foundations to further enhance and promote their giving. For our list, we've identified the top 10 black celebrities and professional athletes who have made the most substantial and historic philanthropic gifts of all time -- including some new leaders in the arena. Our list may surprise you.

Lou Rawls

Remember The Lou Rawls Parade of Stars? When the legendary crooner passed away in 2006 at the age of 72, he helped the United Negro College Fund (UNCF) raise more than $200 million to benefit over 65,000 college students. Rawls never had the opportunity to attend college, so he made it his priority to ensure that students, regardless of their income, are able to attend and graduate from college. Michael Lomax, the president and CEO of UNCF shared in a 2006 interview, "Lou did not receive the kind of recognition that he deserved. He was someone who [came along] before entertainers recognized that celebrity could be used for humanitarian purposes -- and that's been lionized by people like Bono (of the rock band U2) -- [Lou] was already doing that." (Source: The Non Profit Times, Feb. 1, 2006)

Oprah Winfrey
"I believe that education is freedom. I believe that education saved my life." - Oprah

Oprah Winfrey is probably one of the most well-known philanthropists in the world. With a fortune exceeding $2.3 billion, her charitable contributions are numerous. Through her charitable foundations, Oprah's Angel Network, the Oprah Winfrey Foundation and the Oprah Winfrey Leadership Academy Foundation, it is estimated that her giving exceeds $300 million. Although she experienced hardships during her childhood, she excelled in school and has made it a priority to ensure that children all over the world get a quality education. In 2007, she opened the Oprah Winfrey Leadership Academy for Girls, a free residential school for girls in South Africa, and in December 2009, gave the students at the Ron Clark Academy, a private middle school in inner-city Atlanta an early Christmas gift -- $1.5 million.