Editor's Note: In an American Morning original series, “Big Stars, Big Giving,” Alina Cho looks at celebrity philanthropy and how these big stars can make a big impact. Through one-on-one interviews with Elton John, Ben Stiller, Madonna, Martha Stewart and Richard Branson, she shares what causes have become their passion, and how you can get involved. In part three, Alina sits down with Madonna in a rare one-on-one. Wednesday, 6-9 a.m. ET – only on CNN.
and how you can get involved, visit Impact Your World.