Before the invention of the internet, children were forced to learn Disney song lyrics through viewing the movie hundreds of times, and slowly driving their parents insane in the process.
The chances that you were actually singing the opening song from the Lion King correctly though, are about as good as Disney making Home on the Range 2. What you were probably singing was some gibberish nonsense like..
"Mama the chihuahua. It's a ghoul."
Don't worry, nobody knew what the hell those Disney characters were singing about.