Quoting A❤T=P[Bun in th Ov:" make up words to your favorite songs/tunes to sing to your kids? We make ridiculous smurf all the time. ... [snip!] ... her in the tub What is your favorite song to sing at bedtime? I always sing Garth Brooks...usually If Tomorrow Never Comes."
we sing "brush, brush, brush your teeth, brush until their clean, up and down and all around, make them sparkly clean" to the row your boat tune.
and i sing "emily, emily, emily raeyne, that is your name, yes that is your name" instead of jingle bell rock.
there is a lot more though