Definitely her eyes - agree with shelbo1 ... the ones that sparkle turn me on like crazy!
Eyes, this is what I notice first. A lady who has sexy eyes can get me to do anything
Eyes are the first things I look at especially when I was single ,as Eye Contact was usually the first approach. I still do that today but have to be more careful with being married. Eyes are a very good indication if someone is interested in you
Eyes are the windows of the sole, and it is the place I will always look at first.