Who is this elegant lady/TV talk show host?

I've never seen her before. She has a wonderful way of relating to her interviewees and has a sort of class and style you really don't expect see any more. Are most American DLers familiar with her?

https%3A//www.youtube.com/watch%3Fv%3D3zd8Ps60QFQ


Letter%20from%20London
• We always have been gratified that she dropped her burgeoning medical career as a cardiologist and moved into television. Her sort of class is something woefully lacking today.

  http://www.cognacscorner.tv/

  A%20fan

• .

• Almost zero interest in this woman, why? I'd love to know more about her.

  OP

• RHONY Aviva at Cupcakes that Care.

  https://www.youtube.com/watch%3Fv%3DD4eByNZgadA%26list%3DUUPKvnB_viQu3VlZRLKrNj9w%26index%3D5

• I think it's Joanie Sommers.