I once read that to get the loop out of your head, you have to "finish" the song, i.e. play it to the end, either in your head, sing it or play it on the stereo

I once read that to get the loop out of your head, you have to "finish" the song, i.e. play it to the end, either in your head, sing it or play it on the stereo. Works reasonably well for me.