Kate McGarrigle ( February 6, 1946, in Montreal, Canada - January 18, 2010) was a Canadian singer-songwriter famous for her emotional songs written in the folk style. With her sister Anna McGarrigle, she had success in the 1970's where they were well known for their harmony singing. Some of the McGarrigles songs became hits for singers such as Linda Ronstadt and Maria Muldaur. Kate married singer Loudon Wainwright III and had two children, singers Martha Wainwright and Rufus Wainwright.