After Hanoi Rocks broke up in 1985, Monroe decided to start his solo career, but first he got to work with his good friend Stiv Bators. In the Fall of 1985, Bators and Monroe were asked by Steven Van Zandt to record backing vocals in London and then fly to New York to appear on his song "Sun City" and its music video. Both agreed and recorded backing vocals for the song, and both can be seen in the music video.