Sandra L. Tilley (May 6, 1945[1] or 1946[2] – September 9, 1983)[2]was an American R&B and soul singer, best known for being a member of Motown girl group the Velvelettes; and later joining Martha and the Vandellas.

She would become a familiar face in the Cleveland music scenes of the 1960s, taking work as a fill in back up singer for The Orlons.

She recruited into The Velvelettes in late 1965 by Gill, as a permanent replacement for member Gail Sonders, would retire the group to focus on her family.

She sang on the chart hit "Bless You", "Your Loves Makes It All Worthwhile" and the album Black Magic before the group splintered altogether following a farewell tour in 1972.

Tilley's highlights as a Vandellas member included performing at the Copacabana in New York City with Judy Garland and F. Lee Bailey in the audience.