In 1966, he recorded his first single, "I Need Your Love," with The Masters for Philadelphia-based Crimson Records. After graduating from North Penn High School in 1966, John enrolled in Temple University in Philadelphia, where he met Daryl Hall, a senior at Temple who was also a professional musician. The two were involved in several college bands, then formed the duo Hall & Oates, and by 1972, they had signed with Atlantic Records. Hall & Oates went on to record 21 albums (to date), which have sold over 80 million units worldwide, making them arguably the most successful duo in pop–rock history. They have scored ten number-one records and over 20 Top 40 hits and have toured the world for decades. Their involvement in the original Live Aid concert and the charity single "We Are the World", both in 1985, established them further as artists. Their influence on modern American pop music and considerable contributions have been acknowledged by numerous contemporary bands, including Gym Class Heroes and The Killers.