Earworms who gets em? and what are they?

[Inhouse Bob]

Happens all the time, but I now know the cure! "Sing" the theme song from Sanford and Son in your head for a little while. It will push out whatever you have in there and it isn't likely to get stuck in place. It also works when you can't clear your head to get to sleep.
https://www.youtube.com/watch?v=Tl71DM84Wc4
It's kinda like magic