For the last several days, my "earworm of..." (it wouldn't be "choice", would it? It chose me) has been Stan Rogers' shipwreck song "The Flowers of Bermuda". Since it's Saturday, and I didn't have anything else planned, here you go -- "The Flowers of Bermuda - YouTube" [Lyrics on mudcat.org].
For background, see this excellent article in 'How Legends Are Made: Stan Rogers, “The Flowers of Bermuda,” and Air Canada Flight 797' in Sing Out!. Note: the "Continue to page N" links are broken -- use the little numbered links on the next line. Or if you're lazy,
Page 1, page 2, page 3, page 4, page 5.
( lyrics (copied from Mudcat), if you don't want to click through: )
I may have to learn the chords for it now. And maybe hear something else in my head when I'm trying to sleep?