So far I think “Uptown Funk”, “Blinding Lights”, and “Old Town Road”. That doesn’t mean I love those songs. It means I think they answer the question. I know you may love “Irony x3” by Zigbones. But they ain’t it.
Edit: I’m sorry for the poorly worded question. I think it’s autism related, but I don’t see possibilities or alternative understandings easily, and when I wrote “decade” I thought 10 years and that was it.
Of course anyone answering from the perspective of 2010-2020 was making a perfectly reasonable and rational answer and I was very dismissive. I’m really sorry for that.
Nothing too niche or topical. Has to have some sort of timeless quality, meaningful lyrics and emotional resonance. Not a “fad” genre, a sea shantey won’t do (yes its centuries of tradition but in it’s old form it isn’t mainstream). Cultural impact which means it will moat likely be from your mainstream artists, taylor swift, kanye west, maybe billie eilish gets there. I also think it’s probably going to be more women defining an era of music than ever before.
Added advantages, either something that was early in a musical tradition or helped it peak, we’ve seen this with classics in the moat recent big genre, rap.
As for the tiktok songs. We don’t know how internet virality affects the legacy of these songs. A lot of the earbugs are shallow short bits. I’m going to ignore those, otherwise I think some of the smarter songs will maybe be appreciated a little while later too.
So my list:
I think a couple of these are pre 2014 tho. But are within the last 15 for sure.