I've always loved this one.
Incidentally, Blockbuster had a very similar riff to Bowie's Jean Jeanie.
I rememeber Sweet singing Blockbuster on the Golden Shot. I was watching with my grandparents and I thought it was fantastic but they were disgusted and complained how they shouldn't be allowed on TV
(adopts seriously flat Lancashire vowels, taps ash of humungously large cigar, rattles ludicrous amounts of jewelry, smiles at camera and says -
"Now then now then .... as it 'appens, you see ... ladies and gentlemen, guys and gals ... just over there ... none other than ... the very wonderful ... double-fab ... Sweet ... and howzabouthathen????"