There were two bands with that name:

1) The pioneers of Croatian rhythm'n'Blues and Rock'n'Roll. A vocal quartet formed by four friends whose names/nicknames started with an M: Miro, Malim Muki & Medo. They sang translated versions of foreign hits, mostly the Coasters'. In 1969, they represented Yugoslavia in the Eurovision Song Contest with the song "Pozdrav svijetu". As the rules of the contest at the time didn't allow the participation of band, they were credited as Ivan & M's.

2)4M were formed from the remnants of Tunnelvision who were minor bit players in the Factory Records story.
They are Chris Anderton, guitars,bass,keyboards and production and Tony Ashworth drums,percussion,keyboards and production. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.