User blog comment:Tdiandrockmusic2/News... that you probably already know.../@comment-1874924-20100314161905

Kaufman recently confirmed on his blog that only the name is changing, not the concept. The singing will still be there. As for what they will sing, my guess is that the lyrics will be original; but the tunes could be either original (in the styles of well-known songwriters) or pre-existing. There are a lot of well-known songs old enough to be in the public domain.