Before long, Reeves was working several hours at Hitsville as Stevenson's right hand. (She also did A&R work in addition to secretarial work for Motown.) By 1961, the Del-Phis had changed their name to The Vels and recorded singles for Checker and Checkmate Records. One day, when Mary Wells could not attend a session, Reeves stepped up to the microphone and called in the Del-Phis. With "I'll Have to Let Him Go", Martha and the Vandellas was born. Then, when the Andantes could not make a session to back the Miracles' drummer on songs he was recording, Martha called her groupmates. The ladies (a trio after Williams' departure) provided backup vocals for Marvin Gaye's "Stubborn Kind of Fellow". The single became a hit. Martha and the Vandellas backed Gaye on his first three singles, his first album, and on stage—even after they had their own hits.