I love when Soph sings

I just heard Soph, who is supposed to be napping, sing, "ah, ah ah ah, ah ah ah, ah, ah, ah ah ah ah." A Regina Spektor special. Sophia is the first of my children who, when she sings, I can tell what she is singing. Dalt and Joe sing all the time, Dalt especially loves singing behind any closed door or pulled shower curtain, but to no avail. Their "Silent Night" sounds just like "Twinkle Twinkle" to me. Pitch, tone, and words are almost always off. They've got good rhythm though.