Popcorn, oohhhh your talkin my language now!
Popcorn is similar to Northern in as much as it's a contrived genre, the records existed largely before the name Popcorn was associated with it.
Generally this style is a big mix up between soul, early rock n roll, teenbeat and rockabilly.
Most records generally consist of a big beat, cheesy lyrics and either a big baritone voice or a very country and western type vocal.
Some of their "oldies" are listed as:
* Douglas Banks - Aint That Just Like A Woman
* Ralph Graham - She Just Sits There etc etc.....
And I love it!
Hope this helps
Jodie x