Good Riddles

Question: I attach to your hip and I sing all day.
All I want to do is play.

Question: If you have two twins, three triplets and four quadruplets; how many people do you have?

Question: I only come out when I see lights My colour is opposite of white Mostly, you don’t realize that I’m with you If you leave me, I’ll keep follow you I’ll always copy whatever you do You can’t touch me and I can’t touch you What am I?

Question: Soft and cuddly, I'll pull on your heart.
But take my last name and I'll tear you apart.

What am I?

Question: A wise man once called me "the moist star", and in an infinite sea, I can be seen afar. I create motions in which you may ride on for sport, and am also used as a scientist's port. What am I?