From the Tumblr page of the MLP G5 group

A video containing demos for unreleased G5 holiday songs was uploaded to YouTube!

https://www.youtube.com/watch?v=v5yhVdf6zkw

The video contains multiple demos of the following songs:

Wishday Wonderland
A Little Bit of You
Anything For You
Sweetest Wishday
Where You Are
Sweetest Time of the Year
Happy Wishentine
Magic Time
Wishday Cheer
Happy Holidays
Of the songs listed, only A Little Bit of You and Sweetest Time of the Year were released in the albums My Little Pony: Secrets of Starlight and Tell Your Tale: The First Album.

A torrent and Mega folder (https://mega.nz/folder/gg5lRQqB#2JEMTRzDZXW5c2DfLV_QBA) are also included with the video. They include WAV and MP3 files of the songs, lyrics, and even stems and instrumentals for A Little Bit of You and Sweetest Time of the Year!

As always, a big thanks to Doc Anubis for sharing these!