Jack and Jill were an American pop duo active in the late 1980s and early 1990s. Comprised of Gillian Hanna and Jack O'Brien, their music combined elements of pop and folk, characterized by catchy melodies and harmonious vocals. Although their commercial success was relatively short-lived, their debut album, "Work of Heart," produced a hit single, "The Chase," that reached number 15 on the Billboard Hot 100, securing their place in music history. The duo was known for their lyrical storytelling and the distinctive interplay between Hanna's soprano and O'Brien's tenor voices.