VIDEO : How John Legend's Life Has Changed Since He Became A Daddy

John Legend shared with E! how his life's changed since daughter Luna made her entrance.
He used to be a tea man, but now that Luna's in the house, he chugs coffee.
He's switched over from a night owl to an early bird.
And he sings a special song when Luna's having her diaper changed. "Somebody's got a stinky booty, la la la!"