PHILADELPHIA — Daryl Hall is suing John Oates. The pop and R&B duo formed in Philadelphia in 1970 has forged one of the most successful alliances in musical history. In their heyday — between 1974 and 1991 — the partners scored 29 Top 40 hits and six that reached number one. They’ve been inducted together into both the Songwriters and Rock & Roll Hall of Fame and are generally considered the most commercially successful pop music duo of all time. But all is not well in Hall and Oates land. On Nov. 16, Hall filed a lawsuit against Oates in court in Nashville, Tennessee. Philadelphia Magazine re...