 Have you seen The Little Mermaid.  Ariel was very popular when it came out.
I did!  I was fortunate enough to watch it in the theaters when it debuted back in 1989.  It's still one of my favorite Disney features.
It's actually from and 1836 tale by Hans Christian Anderson
A lot of Disney's animations are based off his work.  Frozen was based off of his fairy tale, "The Snow Queen."