I'm a child of the 80's/90's and loved Roxette. I knew all of the words - or so I thought - and would sing along all the time.
I recently found out that "I'm gonna get dressed for simon says" is really "I'm gonna get dressed for success" That makes more sense since the song is called Dressed for Success...
A childhood belief about misheard lyrics

others believed things like this
- When I was little *I thought that if I dressed in all white I would become invisible.Sadly,I wasn't.XP— Kiki
- i thought that if i dressed in my holly hobby doll's clothes, no one would be able to find me.— pikl
- when i was a little girl i thought God looked like my grandma and dressed like the statue of liberty. Anon
- i used to believe that the people on TV could see me. i never watched tv without getting dressed first!— Katy
- When I was a kid I used to believe that cartoons were people dressed up in special costumes.— Sarah-Jane
- I used to believe that I could control the weather... I had limited success— Mark