Good Riddles

Question: A girl dived in the sea.. some say there are two humans under the sea. Why is that?

Question: I'm priceless, and cannot be bought, Some seek my purpose, Others destroy me, Those who steal me gain no more, I never last forever, but can a life-time. What am I?

Question: What chair can move

Question: To get to the word SCARY to ALONE, changing only one letter at a time to make 8 different words including SCARY and ALONE.

Question: I'll amuse you for an entire evening, But you won't remember me. What am I?