Ever dance to Calvin Harris's hit, This Is What You Came For featuring Rihanna? There's an interesting backstory. While Rihanna's vocals are unmistakable, did you know that Taylor Swift co-wrote the song under the pseudonym Niels Schoberg? The collaboration between Swift and Harris remained a secret until Swift's representatives confirmed it. The song became a massive hit, charting in multiple countries and receiving several platinum certifications. It's always fascinating to discover the hidden stories behind chart-topping tracks. Stay sharp with TIL.