BREAKING. Oprah Winfrey on the moment when she's felt the biggest pressure to be 'Oprah'.

In a very revealing moment, Oprah Winfrey has opened up about what moment in her life she has felt the most pressure to be "Oprah" - the billion dollar talk show media mogul of the media, television and entertainment world - who is now ranked second on Forbes magazine's annual Celebrity 100 List for 2012.

"What has been the moment for you where you have felt the most pressure to be 'Oprah'?" Zack Anner asked her in the penultimate episode of the reality show Your OWN Show just shown on Mzansi Magic (DStv 107).

In Your OWN Show, viewers see contestants competing to get their own talk show on Oprah Winfrey's TV network, OWN.

"The most pressure to be 'Oprah' is actually in creating this network, The Oprah Winfrey Network," said Oprah Winfrey. " I think the world expects this network to immediately be what The Oprah Winfrey Show has been - and which has taken me 25 years. It has taken me 25 years to create The Oprah Winfrey Show.

"At my heart I'm really a teacher, and that is really the purpose of this TV network," said Oprah Winfrey. "It is to use it as a tool for teaching and inspiring and giving people back to themselves so that people can see the best of themselves."