What is the best Christmas gift you want to give to your girlfriend?

My Christmas gift for her will be I will treat her in a salon to have her hair rebonded. Why? This is my way of thanking her for all the delicious foods she is cooking for me. That often times I noticed because she's too busy on cooking for me, she can't find time to fix her hair. And I heard her saying a couple times that she's having insecurity because of her fluffy hair. She kept on looking her pictures where she still have a shiny and straight hair. So I am very sure that this gift will really make her very happy.