Answer:
What contains zero calories, but if you consume it, you will probably gain weight?
Lovely and round, I shine with pale light, grown in the darkness, a lady's delight.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
My first is an insect; my second is a border; my whole puts the face in a tuneful disorder.
I drive men mad for love of me. Easily beaten, never free.
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.