There are some very creepy song lyrics, for instance London Bridge's lyrics or this children's tune Tōryanse: "Going in is easy, but returning is scary." As for me, I've recently been marked by the lyrics of this American folk ballad: Oh My Darling, Clementine.
Clementine is the daughter of a miner. Light as a fairy, she drowns in a river and dies because of her big feet. The narrator, Clementine's father or maybe her lover, laments her passing until the day he kisses her little sister and forgets his dear Clementine. Oh my god! What the hell is that ending ?! What the heck is that guy playing at ?! In any case, it was a powerful song.