I think that my family now has a group favorite song to sing along to. That song would be "Everyday" by Buddy Holly.
Last night, we actually did sit around singing it together. It might be Ella's current favorite song (and she breaks out it in often. In public.).
After we listened to it I heard her say, to no one in particular, "I just really love his voice."
She's a very discerning almost-4-year-old.