Blue System Sorry Little Sarah 1987 #Video #EuroDisco While Thomas played Dieter's songs in the USSR, Dieter Bohlen himself founded a new group - Blue System. Blue System was introduced on October 1, 1987 and became known after the first song Sorry Little Sarah. Dieter hoped that Modern Talking fans would become Blue System fans. He said, "After Modern Talking, I thought for a long time about what I would do next, and this song is the first hit in Germany, but it was a big challenge for me to write this song."