How could I NOT do it? Blythe and Rainbow Dash have the exact same voice actress, and at the end Scootaloo says "we'll be best friends and sisters too". No way I could pass up such an opportunity.

The song is from Littlest Pet Shop, which, by the way, you should watch. The video is from, of course, My Little Pony, and neither of those two things are of my creation.