When I first heard the Leonard Cohen song "Hallelujah" I misunderstood the line that goes "love is not a victory march" I thought it said "love is not a HIPPY march". Oops!
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that the B-52's song "Love Shack" was actually "Love Shark!"— Natalie
- Until I was well along in years I always thought our family was Irish because my dads birthday was March 17th— Gladys
- I used to think the song "love the one you're with" was called "love the one, your win. — Glowworm
- I always hear Manic Street Preachers 'You Love Us' as 'You Love Arse'.— Lou
- In Beyonce's song 'Crazy in Love', I always thought she said 'Daisy right now'.Anon
- that song that goes *bring me a higher love*
i thought it said *breathing in iron lung*— oi