“I Kissed A Girl” isn’t just for clubbing anymore, lots of parents are using it for putting their baby to sleep. The sound of the lullaby is changing. New York Times Motherlode Blog author Lisa Belkin discovered that “Twinkle, Twinkle” and “Hush Little Baby” have been replaced by “Sweet Child of Mine” by Guns N Roses and ” Umbrella” by Rihanna. What songs do you croon to cajole the little ones to bed?