NIGHTMARE / What's Happening (Single)
Please note the UK version had early versions of the B-Side 'What's Happening' Credited as 'Music Man' it is the same song
This is the Original UK 45 on Track Cat No 604026
Japanese Issue
Possibly French ?
German Pressing
This is a very rare American Promo Pressing with 'I put a Spell on you' as the B-Side