
A: Because the nation loves a tacky novelty act who can put on a variety of silly (but entertaining) styles and performances e.g. Ghosbusters, Wham. The fact that John and Edward (very traditional English names) can't sing for toffee is a mere footnote to their camp brilliance. *
And what's your response, my lovely jubblies??
* Actually that's only the partial truth. "Camp brilliance" is a rather charitable comment to make, I feel...