Betty Wright

Bessie Regina Norris, better known by her stage name, Betty Wright (born December 21, 1953), is a Miami-based soul and R&B singer-songwriter, who won fame in the 1970s with hits such as "Clean Up Woman" and "Tonight Is the Night". A pioneering singer-songwriter and entrepreneur, she remains one of the few black female musicians to have a gold record on her own vanity label. She is adept at using the whistle register.

source: Wikipedia