Right, the title of this contest is a pretty bad music pun. The actual theme is Music in Doctor Who (in-universe, not the score). Instances when someone was playing an instrument, listening to music on some device, singing a song, anything music. Usual rules apply. I'll get this party started with Ace and her '80s Ghettoblaster:
My memory must be failing me. Which episode was that?! Clever! And, thanks, now I've got that Britney Spears classical music stuck in my head. Any more entries?