Tara Strong, (aka Twilight Sparkle) is recording at home, near LA, not in Canada, she Does not sing for Twilight's voice she doesn't do random ponys all the time because it is harder. She loves to always to have a stuffed character for what ever she was as the voice actress.
We all know about Scootaloo and her flying problem. In Season 3, she might get to fly! We don't know if this is really going to happen, but hopefully we get to see an episode with just her.
Tell me what you think, and maybe I can answer your questions!