Bonnie Lou, born Mary Joan Kath, was a prominent American musical artist active in the mid-20th century. She was recognized for her versatility, successfully venturing into country, rockabilly, and pop genres. Bonnie Lou is most known for her hits "Seven Lonely Days" and "Tennessee Wig Walk", which exemplify her distinctive fusion of styles. As one of the first female rock and roll singers, she significantly contributed to the genre's early development.