Or as an alternative, what I have been doing: when I post a song relating to a longer discussion, I post it as an entirely separate "Lyric Addition: Song Name" thread, and make a note of this as an entry on the discussion thread - "see my recent post of Song Name lyrics on a separate thread".

Reasons: (1) someone looking for the lyrics can pull up an extremely short thread, containing that song only, instead of having to retreive & look through a whole long thread; (2) DT editors can quickly find the song lyrics, without searching through anywhere else; (3) if the song relates to more than one long discussion, I can cross-reference it easily [e.g.: several Hebrew / Yiddish songs I posted recently, with a note to "see lyric addition" on both the Women's Song Circle, and the Hebrew/Yiddish/Ladino Songs discussion thread.]