Answer
Kara DioGuardi's birthday is December 9. She is an American singer-songwriter, record producer, and television personality. She was born in Mount Kisco, New York, in 1970. DioGuardi began her music career in the 1990s, writing songs for artists such as Christina Aguilera, Pink, and Gwen Stefani. She gained wider recognition as a judge on the eighth and ninth seasons of the television show American Idol.