Marva Lee, also known as Marva Whitney, was an American funk singer. Active primarily in the 1960s and 1970s, she is best known for her work with James Brown, who labeled her as "Soul Sister #1". Lee's music, characterized by powerful vocals and energetic rhythms, had a significant influence on the development of funk and soul music. Her most notable hit was "It's My Thing", which became a staple in the genre and highlighted her signature sound.