Stars In Her Eyes

"she has stars in her eyes” I heard it, but I did not understand it. Makes as much sense to me as milking a frog. Or kicking the moon or diving into a tree. Stars in her hair I could understand. My sister and I used to brush our hair one hundred strokes. We could hear static electricity popping and kicking in the dark. We could reach out and get zapped by it. Ouch! But stars in her eyes? I have no possible schema that understands it.