Dieter Bohlen also composed for other artists while still in Modern Talking, such as for Chris Norman and Smokie, whose song "Midnight Lady" (1986) remains Bohlen's most popular composition. He also composed a large number of tracks for C. C. Catch, using an accelerated, less-romantic sound. Some English Bohlen songs such as "You're My Heart, You're My Soul" were also recorded with German lyrics by Mary Roos, using the same playback tracks. When Modern Talking split up in 1987, a number of tracks written for the last album were re-arranged and then transferred onto Bohlen's first solo album by Blue System. Modern Talking's sixth album was released about the same time as the first single from Blue System, "Sorry Little Sarah", where Bohlen competed on the charts against Modern Talking's "In 100 Years" hit song.