During an appearance in a New York music club in the summer of 1976, she was discovered by Sylvester Levay and Michael Kunze, who were looking for someone to replace Linda G. Thompson in their successful disco group — Silver Convention. Heath was hired and traveled to Munich, West Germany later that summer to record the Madhouse album. The following year in 1977, Heath and the two other members of the group represented Germany with the song "Telegram" at the Eurovision Song Contest in London. She would go on to record two other albums with the group — Summernights and Love in a Sleeper — before they split in 1979.