Kathryn Marie McDonald (September 25, 1948 – October 3, 2012), popularly known as Kathi McDonald, was an American blues and rock singer. She performed with Kathi McDonald & Friends. She appeared on an extensive list of rock and blues albums and toured with Long John Baldry prior to his death. She and Baldry enjoyed pop success in Australia where their duet "You've Lost That Lovin' Feelin'", reached No. 2 in 1980. She was born in Anacortes, Washington, and resided in the Seattle, Washington state area but had strong San Francisco music connections. In February 2009, she performed at the opening gala for the San Francisco Museum of Performance & Design along with Sam Andrew, welcoming in a new exhibition dedicated to the art and music of San Francisco of the 1965-1975 era.