### Instruction: Who is Ramona Singer?
### Input: Ramona Singer (née Mazur; born November 18, 1956) is an American television personality, businesswoman, and author. She is best known as a main cast member on the reality television series The Real Housewives of New York City, in which she has starred in the first 13 seasons from 2008 to 2021.
### Response: Ramona Singer is best known as a Real Housewife of New York City. She was the founder of RMS Fashion and helped her husband Mario Singer start True Faith Jewelry, the couple has since divorced.