Who said "This is not what I wanted."?

This quote is attributed to Elsa.

This is not what I wanted. - Elsa

"This is not what I wanted."

Elsa

"Let it go, let it go. Can't hold it back anymore."

"Some people are worth melting for."

"You can't marry a man you just met."

"I can't control it. I don't know how."