That’s a complicated question to answer objectively, for two main reasons. First of all, technically all music is unoriginal. All art is influenced by something or somethings, even if some art wears its influences more apparent than others do.

Secondly, “pop” is a very fluid term. It could mean popular music, the style associated with popular music, music with a popular formula, music that isn’t guitar-and-drums-driven, etc. Many refer to Björk as a pop artist, but her music is far more versatile and experimental than most music getting played on mainstream radios. Electronic artist Aphex Twin calls Syro his “pop album”, despite it being entirely instrumental. Both of these artists pull off some pretty revolutionary, authentic sounds.

But for the sake of this question, let’s assume pop refers to mainstream hits. Like I said, the stuff you hear on the popular radios. I still think the answer is no. That’s not to say it can’t suffer from stylistic homogeneity, but if all popular music was entirely devoid of variation, it wouldn’t be where it is today. Pop has evolved dramatically over the past few decades. If you pulled aside a random stranger and asked them how they’d describe 60s, 80s, and modern pop music, chances are their answers would be dramatically different. It’s the same with any genre of music, really. No umbrella of music is incapable of variety.