Deniece Williams

June Deniece Chandler (born June 3, 1950) known by her stage name Deniece Williams is an American Grammy Award-winning singer, songwriter and record producer who achieved success in the 1970s and 1980s. Williams, whose music has been influenced by Soul and Funk, is known for her hits such as "Free", "Silly", "Let's Hear It for the Boy", "It's Gonna Take a Miracle", and for her many vocal duets with Johnny Mathis.

source: Wikipedia