Helen Kate Shapiro (born 28 September 1946) is a British pop and jazz singer and actress. While still a teenager in the early 1960s, she was one of Britain's most successful female singers. With a voice described by AllMusic as possessing "the maturity and sensibilities of someone far beyond their teen years", Shapiro recorded two 1961 UK chart toppers, "You Don't Know" and "Walkin' Back to Happiness", when she was just fourteen years old.