Jumped on the Theme Song bandwagon:
[hider=Celestia's Themes]Theme 1:
[youtube]https://www.youtube.com/watch?v=kDpDYRkmmkA[/youtube]
Theme 2:
[youtube]https://www.youtube.com/watch?v=TybA2Hba5_0[/youtube][/hider]
They double as battle themes as well.