Conversation so far:
What were some of the songs in the movie, Dreamgirls?
Songs from Act I of Dreamgirls include I'm Lookin' for Something by The Step Sisters, Move by Dreamettes, and And I Am Telling You I'm Not Going by Effie White.
What were other songs in the movie, Dreamgirls besides I'm Lookin' for Something by The Step Sisters, Move by Dreamettes, and And I Am Telling You I'm Not Going by Effie White?
Songs from Act II of Dreamgirls include Patience by Jimmy Early, Lorrell Robinson, C.C. White, and Chorus and One Night Only by Effie White.
What genre of music was in the movie, Dreamgirls?
The story follows the history and evolution of American R&B music during the 1960s and 1970s.

Question: Who were the artists that performed the music?
Self-contained rewrite: Who were the artists that performed the R&B music in the movie, Dreamgirls?