When i was younger, i heard The Beatles sing:
Shes got a ticket to ride,
shes got a ticket to ride,
shes got a ticket to ride,
but she dont care.
My baby dont care.
My baby dont care.
I thought they sang:
Shes got a chicken to ride,
shes got a chicken to ride,
shes got a chicken to ride,
but she dont care.
My baby donkey.
My baby donkey.
Lol. To my surprise, i've found a flashfilm on a website with a chicken riding a baby donkey, and that very same song playing in the background:
http://www.rathergood.com/chicken/
A childhood belief about misheard lyrics

others believed things like this
- the beatles song 'mean mr mustard' says "shes a real go-getter", i was sure it was "shes a real coconut"...— sally
- The Beatles song "Ticket to Ride" always came out "She's got a tick in her eye."— Kurt
- i used to believe that Chicken McNuggets come from baby chickens.— Micky D =)
- I used to believe that Chicken Mc Nuggets were made from baby chicks— Sara
- When I caught chicken pox, I thought it was down to me eating too much chicken.— Helen
- I used to believe that if you buried a chicken bone in the backyard it would grow a chickenAnon