Thank you sooooooo much for 18k reads and 2.2k votes.
This hidden secret was spotted by @Alliegator456 and @Chyane2277.
During the film 'Frozen' Cinderella makes an appearance at the same time as Tiana( hidden secret #21) during the song 'First time in Forever', while the guests are walking through the gates.
Please vote for @Alliegator456 and @Chyane2277.