A childhood belief about misheard lyrics

I had a cousin who was convinced the first line of "you're the one that I want" [from Grease] was "I got you, them bolts are flying" [it's "I got chills, they're multiplying"] I didn't know what the words were and she was so adamant she was correct I believed her and could actually *hear* "I got you, them bolts are flying" every time I heard the song, until a friend wet herself laughing at me and told me what the words actually are.
I have another cousin who was running around yelling "Hey whatcha doin'" to a familiar tune, I asked what she was singing and she said "winter wonderland", the first line of which is, I corrected her [nicely!], "Sleighbells ring, are you listenin'".
I knew a guy who's nephew thought the Ghostbusters! theme was called "Jack the bastard", none of us could quite figure out why ...