NYA -- I know who Bob Horn was, but I was a really little kid when his scandals broke out -- for those who have no idea what we are talking about, he was the original host of "Bandstand" before Dick Clark.
So anyway NYA -- of course Danny and the Juniors were South Philly too. And Chubby Checker, I believe. Remember a West Philly group, Lee Andrews and the Hearts? They had a lot of wonderful ballads. How about Charlie Gracie, "You Butterfly?" Some great soul singers from Philly -- Garnett Mimms, Solomon Burke. Remember two guys from the late 60s -- Billy Harner and Bunny Sigler? They were pretty much only played in Philly, on WIBG and WFIL. Great times. I could go for a Frank's Black Cherry Wishniak and a Tony Luke pork sandwich right about now.
I used to work as a contractor down the street from Chubby Checker house in Paoli. His tour bus was always parked outside.
I remember Lee Andrews and the Hearts "Teardrops", Garnett Mimms when he was with the Exciters. The believe the girl group that did "Please Mr. Postman" was from Philly as well.