Madonna sinks flanked by the two Malawian children she adopted -- David Banda and Mercy James -- in a classroom at Mkoko Primary School, central Malawi, on April 2, 2013.
Celebrity charity in Africa - Madonna —
Madonna sinks flanked by the two Malawian children she adopted -- David Banda and Mercy James -- in a classroom at Mkoko Primary School, central Malawi, on April 2, 2013.
AMOS GUMULIRA/AFP/Getty Images
UNHCR Goodwill Ambassador Angelina Jolie visits Somali refugees in Tunisia in April 2011.
Celebrity charity in Africa - Angelina Jolie —
UNHCR Goodwill Ambassador Angelina Jolie visits Somali refugees in Tunisia in April 2011.
UNHCR/Getty Images
George Clooney attends the independence referendum vote in Juba, South Sudan, in January 2011. Clooney is co-founder of the Satellite Sentinel Project, which uses satellite imagery to watch for aerial attacks and troop movements in Sudan and South Sudan.
Celebrity charity in Africa - George Clooney —
George Clooney attends the independence referendum vote in Juba, South Sudan, in January 2011. Clooney is co-founder of the Satellite Sentinel Project, which uses satellite imagery to watch for aerial attacks and troop movements in Sudan and South Sudan.
Spencer Platt/Getty Images
Oprah Winfrey poses with the graduates of the school she funded, the Oprah Winfrey Leadership Academy for Girls in Henley on Kilp, South Africa, in January 2012.
Celebrity charity in Africa - Oprah Winfrey —
Oprah Winfrey poses with the graduates of the school she funded, the Oprah Winfrey Leadership Academy for Girls in Henley on Kilp, South Africa, in January 2012.
Michelly Rall/Getty Images
Irish rock star Bono leaves the Genadendal presidential residence after a meeting with the South African President Jacob Zuma in February 2011. Bono has worked on a number of humanitarian causes related to Africa.
Celebrity charity in Africa - Bono —
Irish rock star Bono leaves the Genadendal presidential residence after a meeting with the South African President Jacob Zuma in February 2011. Bono has worked on a number of humanitarian causes related to Africa.
Gianluigi Guercia/AFP/Getty Images