Roots of Nina Simone

Raymond Edward O'Sullivan, known professionally as Gilbert O'Sullivan, is an Irish singer-songwriter who achieved his most significant success during the early 1970s with hits including "Alone Again (Naturally)", "Clair" and "Get Down". His songs are often marked by his distinctive percussive piano playing style and observational lyrics using word play.

Alice Smith is an American singer and songwriter, her style anchored in rock, R&B, blues, jazz and soul.

Janis Ian is an American singer-songwriter who was most commercially successful in the 1960s and 1970s. Her signature songs are the 1966/67 hit "Society's Child " and the 1975 Top Ten single "At Seventeen", from her seventh studio album Between the Lines, which in September 1975 reached No. 1 on the U.S. Billboard 200 chart.

Felix Stallings Jr., known professionally as Felix da Housecat, is an American DJ and record producer, mostly known for house music and electroclash. Felix is regarded as a member of the second wave of Chicago house.

Johann Sebastian Bach was a German composer and musician of the late Baroque period. He is known for his prolific output across a variety of instruments and forms, including the orchestral Brandenburg Concertos; solo instrumental works such as the Cello Suites and Sonatas and Partitas for Solo Violin; keyboard works such as the Goldberg Variations and The Well-Tempered Clavier; organ works such as the Schübler Chorales and the Toccata and Fugue in D minor; and choral works such as the St. Matthew Passion and the Mass in B minor. He is known for his mastery of counterpoint, as heard in The Musical Offering and The Art of Fugue. Felix Mendelssohn precipitated the Bach Revival with a performance of the St. Matthew Passion in 1829. Ever since, Bach has been acclaimed as one of the greatest composers in the history of Western music.

Annie Ross was a British-born American singer and actress, best known as a member of the influential jazz vocal trio Lambert, Hendricks & Ross. She helped pioneer the vocalese style of jazz singing, with a style described by critic Dave Gelly as "a kind of dreamy watchfulness that is a definition of 1950s hip." In 2010, she was named a Jazz Master by the National Endowment for the Arts.

Zenzile Miriam Makeba, nicknamed Mama Africa, was a South African singer, songwriter, actress, and civil rights activist. Associated with musical genres including Afropop, jazz, and world music, she was an advocate against apartheid and white-minority government in South Africa.

"Nobody Knows You When You're Down and Out" is a blues standard written by pianist Jimmie Cox in 1923 and originally performed in a Vaudeville-blues style in the aftermath of the 1920–1921 U.S. economic depression. A later 1929 recording by Bessie Smith became popular during the early years of the Great Depression due to the lyrics highlighting the fleeting nature of material wealth and the friendships that come and go with it. Since Smith's 1929 recording, the song has been interpreted by numerous musicians in a variety of styles.

Lil Green was an American classic female blues singer and songwriter. She was among the leading female rhythm and blues singers of the 1940s, with a sensual soprano voice. Gospel singer R.H. Harris lauded her voice, and her interpretation of religious songs.