Kathryn Marie "Kathi" McDonald 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.

The Ikettes, originally The Artettes, were a trio of female backing vocalists for the Ike & Tina Turner Revue. Despite their origins, the Ikettes became successful artists in their own right. In the 1960s they had hits such as "I'm Blue " and "Peaches 'N' Cream". In 2017, Billboard ranked "I'm Blue " No. 63 on its list of 100 Greatest Girl Group Songs of All Time.