The Delfonics were an American R&B/soul vocal group from Philadelphia. The Delfonics were most popular in the late 1960s and early 1970s. Their most notable hits include "La-La", "Didn't I", "Break Your Promise", "I'm Sorry", and "Ready or Not Here I Come". Their hit songs were primarily written by lead vocalist and founding member William "Poogie" Hart, and arranger and producer Thom Bell. Wilbert Hart is the last surviving founding member. Their songs have been used in film soundtracks, including Quentin Tarantino's 1997 movie Jackie Brown, in which "La-La" and "Didn't I" underscore the pivotal relationship between the characters played by Pam Grier and Robert Forster. Their songs "Ready or Not Here I Come" and "Funny Feeling" were used in the video game Grand Theft Auto V on the fictional radio station The Lowdown 91.1. From Wikipedia (https://en.wikipedia.org/wiki/The_Del...) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/b...)