According to IMDB, the waltzing scene at the end of Beauty and the Beast is not only similar to the waltzing scene at the end of Sleepy Beauty, it's IDENTICAL. Apparently they were running out of production time and sort of drew over Princess Aurora and her beloved Prince Phillip.
Take a look for yourself:
Sleeping Beauty
Beauty and the Beast
Even the songs are similar! Oh well, guess you gotta do what you gotta do to meet that deadline!
Though, it appears that this wasn't an isolated occurrence:
I guess they figured no one would notice these things. Clearly they didn't count on how much time people would have on their hands. Or websites like Totallylookslike.com.