The musical connection is in the thread title: Soramimi means "misheard lyrics" in Japanese, according to the Wikipedia page, but refers specifically to lyrics which make entirely different sense in a different language, such as Genie's "Die, Loreli!"

One of many examples on the Wikipedia page is a familiar Beatles refrain.
"I wanna hol' yo' han'" sounds like a Japanese phrase:
Aho na hōnyōhan meaning
Idiotic public urination ("hōnyōhan" is a legal term for the crime)

(Italic text borrowed from the Wikipage.)