How many of you actually sing a lullaby to your baby? Any personal favourites?

Mine is good old "Twinkle Twinkle Little Star". The moment I sing this he knows it's time to sleep. I make sure I don't sing this song at any other times so he knows. Normally takes me about 10 to put him to sleep if I sing this song on repeat. Otherwise I'll singalong whatever song is on the radio.