What I was looking for

Apples music app doesnt have the ability to add a currently playing song to an existing playlist (which is how I build playlists). This app adds this function within its own music player thats connected to whats playing in Apples music app.
I like this app for this functionality alone. Only problem now is it needs an iOS7 update because it no longer communicates with the music app. But if you actually want to LISTEN to the music your adding to a playlist, I highly recommend downloading this one.

BenDiAnna about Playlist-Creator: The Ultimate Running, Driving, Workout, Dance, Party, and Relaxing Music Organizer!, v6.0