Neither is singing it at the top of our lungs while using the nearest prop for a microphone. Incidentally, dancing with a screwdriver (the tool) pointed at one's face is not advisable.
This article talks about how songs get stuck in people's heads, the most commonly stuck songs, and even cites medical research on the topic. It gives some suggestions for getting the songs to leave, none of which seem to be too effective. It doesn't, however, give any tips for explaining to one's boss why every sentence in an assessment starts with "every now and then."