Isn't it so annoying when you have a song stuck in your head? I have no idea why but I can't get this song out of my head: What about you guys/gals?
My daughter loves both of the following, and they are both annoyingly catchy! Fortunately the second one is educational.
I'll go you one better -- I have, like, the opening four bars of Pinky & The Brain's theme song stuck in my head. I've caught myself randomly humming it these past few days.
Cleaning the inland taipan tank while humming this song is fun. Maybe I should re-name my taipan Marie-Claire...
Every listening exam/test here use the music "Greensleeves", so it got really stuck into my head. It's sometimes call as the "nightmare music" here because students must listen to it while preparing for the questions. Also probably "Never gonna give you up"
Not a song but a melody is stuck in my head. Its a melody of a musical doll which is playing almost all the time in the birth-room of my second grand-child, born yesterday !