Cher praises 'brave' transgender son to Letterman
Cher Chaz Bono was born Chastity Bono before undergoing a female to male gender change in 2009 and legally changed name in May.
The 64-year-old veteran pop star told Letterman that she and Chaz had discussed her gender change for more than a decade before the surgery was done.
"During the years we had talked about it and I don't really know what made her change her mind, I have still not got the pronoun right but she says that's not so important," said Cher.
"I don't know what made her change her mind, he had changed his mind, then it did not make very much difference but I kept on nagging and nagging.
"Then one day he said to me 'I really have to do this.'
"She was a lesbian, is a lesbian, but it is not the same now. She has a beautiful girlfriend.
"A lot of people have come up to me and said that Chaz is very brave, because to make this decision with me as your mother is difficult. You are in the limelight. You have no place to hide."