Check out this link to:

Evolution of the Disney Princess - Evynne Hollens

 https://www.youtube.com/watch?v=JDvylXjDt8g

It's a compliation of songs by all the Disney Princesses, and shows the changes Disney have made in their hit songs over the years, right from "Some Day My Prince Will Come" with Snow White and The Seven Dwarves in 1937, to "Let it Go" from Frozen in 2013, the messages do change and the women are given more of a voice than simply waiting and wishing, even if many of the songs do still revolve around love.