A few years ago I heard something odd on the car radio, and I thought they can't really be singing that! This was way before I'd heard of Stefani, and maybe I got a bit addicted when I heard more and what it was actually supposed to be. (My terrible listening bad)
So I'll start with a cover version of Stefani's song (mainly as it has nice pseudo symphonic metal singers (I can also do really shallow if called for). I though the lyrics said 'Proper Nazi', hence the surprise, how wrong I was.  Any takers for others?
https://www.youtube.com/watch?v=Enu3Oy6_L-I

Lady Mondegreen

Bollocking time (Mull of Kintyre)

'My wife's bisexual' is not the chorus line of My White Bicycle and I thought for years Jimi Hendrix was way ahead of his time with the line 'Scuse me while I kiss this guy'.

Not forgetting Desmond Dekker's problem "Ohhh, me ears are alight!"

Iron Maiden's 'Fear of the Duck', errr, I mean 'Fear of the Dark'.  Wonder what he sings to air traffic control?

Yes ago, a mate let his younger Police fan brother wander round all weekend, with a home made badge saying "Rock Sand" before he told him.  :