In the early scenes where Prince Charming is walking through town, you can see Belle from Beauty and the Beast pass by in her common blue and white frock, with her nose in a book as usual. This comes moments before he happens upon Jasmine from Aladdin!
Avril Lavigne, Ashley French and G.E.M. sang the song, written by Patrick Stump (from Fall Out Boy), for the official soundtrack of the movie.
Avril Lavigne's first film role in 10 years, and her 2nd Animated Film, after Over the Hedge (2006) released 12 years prior, which was when she made her acting debut.
Sleeping Beauty's necklace has a hidden mickey.