The definition of "popmusic" has changed considerably over time. How did we go from Prince to Taylor Swift, while keeping the same title, "popular music" - or "pop music" for short? Clearly, the instrument-driven sounds of the '70s are nothing like the catchy, digital productions of today. Ultimately, the evolution of popular music was shaped by a gradual reshuffling of lyrical themes, technological innovation, and a monumental restructuring of the music industry, especially in the era of streaming.