Australia's richest woman's causing a stir by demanding her portrait is removed from an exhibition.  Indigenous artist Vincent Namatjira's art exhibition "Australia in Colour" is on display at the National Gallery of Australia.  Mining magnate Gina Rinehart doesn't like her painting and wants it taken down.  Australia correspondent Murray Olds told Mike Hosking that while the portrait's not flattering, it's true to the style of the artist.  He says most of Vincent Namatjira's artworks are caricatures, and it's just the way he paints.  LISTEN ABOVE  See omnystudio.com/listener for privacy information.