First thing that came to mind... the "Don't Wanna Lose You Now" scene from Whitney's "Where Can We Go From Here."
That story was written in 1999, and I read it in early 2000 - so way back toward the beginning of my fanfic obsession, when I was just 14. So, keep in mind, this was the early days of fanfic, before every cliche in the book had been done to the point of being cliche, and I was a total teenybopper, so despite the cheesiness of what I'm about to describe, it's a really good scene and one that has always stuck with me in the 10 years since.
So "Where Can We Go From Here" is like the original Bsb bus crash story, the one everyone wants to copy because it's so heartbreaking and beautiful. Naturally, Nick is one who is injured the worst and is in a coma. The other guys are all in the same hospital, recovering from their injuries, and they go to see Nick for the first time, and they're all freaked out, so Howie, who is the best off, starts singing "Don't Wanna Lose You Now," thinking the music will help them collect themselves, and they all join in. The nurses stop in the hall and pop their heads in, and even if it is cheesy (and now cliched) as hell, it really is a touching scene.
I used to have to play DWLYN while I read it, and then I would cry and cry over it. It doesn't quite do that to me anymore LOL, but DWLYN is my favorite Bsb song, and this remains one of the standout scenes of any Bsb fanfic for me. Chapter 11 of "Where Can We Go From Here."
http://www.dreamers-sanctuary.com/dwlyn/wcwgfh.html