The Delfonics was a quintessential Philadelphia soul singing group, most popular in the late 1960s and early 1970s. Brothers William and Wilbert Hart formed the group with Randy (Rudy) Cain in high school in the early 1960s. Soon, they became known throughout the Philadelphia area, signing with Cameo Records. At Cameo, Stan Watson introduced them to the man who made them famous, producer Thom Bell, then working with Chubby Checker. Bell dreamed of creating a Philadelphia version of Motown and struck gold with the Delfonics