In my headcannon, Gen 4 ones sing with them. Rainbow, Soarin who in my headcannon be Rainbow’s husband, their parents, Daring Do who is Windy Whistle’s sibling and Rainbow’s aunt, Firefly who be mom to Windy and Daring therefore Rainbow’s grandma, Scoodaloo who in my headcannon be Rainbow’s adopted sibling, Rumble who in.my headcannon be Scootaloo’s husband, Rainbow and Soarin’s kids, Scootaloo and Rumble’s kids, Fluttershy, Dyscord who in my headcannon be Fluttershy’s husband, Fluttershy’s parents, Rainbow Magnus who in my headcannon be Misty’s boyfriend as well as son of Somnambuwlar and Flash Magnus, Rarity, Fancy Pants who in my headcannon be Rarity’s husband, their daughter, Zecora, Smolder, Yona, Occelus, Capper, the bird buccaneers, the snow creature Fluttershy was nice to, Strongheart (The bison princess), Coco Pommel, Primal Heart who be daughter to a jungle pony and a pony vet, Octavia, Vinyl, Derpy, and Hooves. And they sing to help Twylight and Sunny vs Midnight Sparkle, and again to help them and Megan William vs Grogar.

It be awesome if Rainbow, FLurtershy and Rarity was singing with them.