Oprah Winfrey to announce she 'll end show in 2011 during a live broadcast Friday . Comment: An estimated 42 million U.S. viewers watch it weekly ; show had its origins in 1984 in Chicago . Winfrey 's wealth was estimated at around $ 1 billion by Forbes in 2004 . Winfrey 's wealth was estimated at around $ 1 billion by Forbes in 2004 .
Oprah Winfrey to announce she 'll end show in 2011 during a live broadcast Friday . Comment: An estimated 42 million U.S. viewers watch it weekly ; show had its origins in 1984 in Chicago . Winfrey 's wealth was estimated at around $ 1 billion by Forbes in 2004 .