Complex sentence: Her father was a comedian, her mother a former dancer before she became her husband's straight man, and her brother, Lance, had been to the Eurovision Song Contest in 1980, the year before Bucks Fizz with the band Prima Donna.
Split into simpler sentences: Her father was a comedian, her mother a former dancer before she became her husband's straight man. Her brother, Lance, had performed at the Eurovision Song Contest in 1980 with the band Prima Donna.