So This Is A Bit Special.

Supergroup The Producers (Lol Créme, Trevor Horn, Ash Soan, Stephen Lipson) were being filmed, "when the discussion turned to Frankie Goes To Hollywood's immortal 'Two Tribes,' specifically whether Mark O'Toole of the band played the full, extremely difficult bassline live or not." And then..."these incredible men who have made some of the greatest pop records of all time, played 'Two Tribes' - the record they originally produced, engineered and played on. And here it is..." 

Video and quotes: Holy Moly!