It is possible to overload the song editor when writing a song for any one of your Miis to sing.  All it takes is for you to delete the original lyrics in each line of the song at hand and replace them with a string of W's containing as many of said letter as the character limit allows for.  When you have done this to your entire song, you can listen to it as normal.  However, when the lyrics start playing, you will notice that the singer's voice begins violently skipping, glitching, and changing pronunciation speeds, even within the very first line of the melody, all whilst simply repeating the phrase "double you".  Then, shortly into the second line of the song, an error message will fade and slide up into view on the touch screen, stating that, "The lyrics you entered could not be sung.", and prompting you to, "Please change them and try again."

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