Heavydirtysoul
This was the song that official got me into Twenty One Pilots.
I heard it in San Francisco (coincidentally, near where the music video for "Tear In My Heart" got filmed), from a skateboarder blasting his music. As he passed me and my family, I heard a snippet of a familiar voice singing the bridge of the song: "Death inspires me like a dog/inspires a rabbit".
I had been hearing Stressed Out on the radios for a while, and hearing yet another song from the same band that I thought sounded good made me decide to look into them more. From the get-go I had enjoyed both their unique lyrics and sound, and unlike other songs we heard on the radio, my family never got tired of listening to Heathens or Ride.
As I listened to their older songs, I realized that I recognized "Holding On To You", "Guns For Hands", and more from Music.ly (I didn't have it myself, but middle school was a breeding ground for kids dancing to "emo" music in the halls). I wisely decided that I wouldn't associate myself with the Clique (the fanbase, known at the time for being toxic and edgy and mostly composed of teenage girls like me) until I knew more about the band.
I've been a fan of them since Blurryface (the album that made them big), just going to my first concert from them a few months ago. To this day, Heavydirtysoul is still one of my favorite songs (even if it's considered a "basic" one by the avid fans).