It sounds like you're looking for help with an exam task, likely a reading or use of English part, that involves the phrase "reality TV stars and serial killers" as an example or answer.
Without the exact question text, here’s a of how such an answer would typically be assessed in FCE: Helpful Review of the Answer Context: In FCE, you often see matching, multiple-choice, or word formation exercises where two seemingly different topics (like reality TV stars and serial killers) are compared — usually in terms of media attention, psychology, or public fascination . reality tv stars and serial killers fce answers