We’re really sorry that a collection of our songs is missing from the songplayer at this moment in time. We’ve refreshed our song catalogue & licensing to help us improve the module songs and to be able to add even more songs to the app in future.
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We will try our hardest to get the song/songs added back to the Justin Guitar app. However, licensing is a very complex process within the music industry and we cannot promise that the (song/songs) will be added back to the app.