Dame Kiri Te Kanawa is one of the greatest opera singers of the past four decades.
The New Zealand born soprano has performed in the great opera houses of the world and sold millions of records.
She's still singing and is also helping the next generation of operatic talent to come through.
But Dame Kiri says some young singers are pressured to be thin and sing like the larger singers of the past but with "tiny bodies".
You can watch the full interview on Thursday 9th September 2010 on BBC World News at 0330, 0830, 1530, 2030 GMT and on the BBC News Channel on Friday 10th September at 0230, 0430 and 2330 BST.