Thanks Emporowet for finding this glitch.
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Have you ever wanted the Dojo Music in your igloo? Well now you can have it!
Note: Other penguins cannot hear this.
1. Go to the Courtyard.
2. Walk towards ninja hideout/dojo.
3. As you get to the door, press home.
Voila! I hope this helps!
~empeh~
Club Penguin Cheats Master