Pepsi & Shirlie are a British pop duo, consisting of Helen "Pepsi" DeMacque and Shirlie Holliman. They first gained prominence in the 1980s as backing vocalists for the band Wham!, before launching their own career in 1987. The duo is best known for their debut single "Heartache," which reached number 2 on the UK Singles Chart. Their music combines elements of pop and dance, characterized by catchy melodies and strong vocal harmonies.