Kathryn Marie "Kathi" McDonald (September 25, 1948 – October 3, 2012) was an American blues and rock singer and songwriter. As a teenager she sang with different bands around the Pacific Northwest before she was discovered by Ike Turner. She sang as an Ikette with Ike & Tina Turner and eventually replaced Janis Joplin as the front woman of Big Brother and Holding Company. McDonald became a background vocalist for various artists, including Leon Russell, Joe Cocker, The Rolling Stones, Freddie King, and Long John Baldry. She also recorded as a solo artist and fronted her own band Kathi McDonald & Friends.