Me: "Alexa you are getting so big. You know that mommy should not have to help you get ready for school in the mornings. You can get dressed and put your shoes on - you're a BIG girl."
Alexa: "I know I am big girl - but I will be your little girl forever (with the biggest smile on her pretty little face)."
At that point, I gave up on convincing her that she was big and just appreciated the moment and her wonderful words!