I've seen multiple people do this, it seems fun and cute, let me know if you wanna be tagged/untagged.
Day 4 — A song that reminds you of someone you’d rather forget.
Zara Larsson — Never Forget You
I remember hearing this song on the radio and I really loved it, and at the time I was listening to it and thinking about my IRL best friend, while texting my online friend. While in the middle of conversation, I kinda came to the realization while hearing this song that I was in love with said best friend. Long story short, he was very much straight and ended up giving me false hope for months just to break my heart. So I'd definitely rather forget him.
Honorable Mentions:
A Great Big World — Hold Each Other
Bring Me The Horizon — True Friends
Galantis — Firebird
Broods — Bridges
Tagging some people I've seen interested in these: