Malaak, Lola, Chris, and Zahra Rock pose with Oprah.

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Malaak calls the trip to South Africa and the Oprah Winfrey Leadership Academy "life-altering" because it reinforced some important lessons about service and volunteering for her family.

Malaak hopes that taking her girls to South African shanty towns, where children live in poverty, and then contrasting that experience with the hope and opportunity of the Oprah Winfrey Leadership Academy will really help her children understand those lessons. "It made my message to my children so much easier," she says.

"I'm always telling these children that, 'You're so blessed,' and that, 'You must give back,' and that, 'Most people in this world don't have what you have,' and you can't really show that in America," Malaak says.