I've misheard some song lyrics too. I can't remember much of them, but I put her few of what I remember. :>
Ayumi Hamasaki - until that Day...
Actual lyrics: sono hi made...
Misheard: So long hi made (

I always hear this one. I don't know why.)
Koda Kumi & BoA - the meaning of peace
Actual lyrics: I want to know the meaning of your love and loneliness
Misheard: I want to know the meaning behind your love and oneniness (Kuu's english is so loveable <3)
Koda Kumi - m.a.z.e
Actual lyrics: Not quite sure what this is really. :p
Misheard: Somebody... please... take me out of this maze/place.
Ayumi Hamasaki - STEP you
Actual lyrics: egao blaa blaa (second chorus)
Misheard: Eikö ookki? (finnish, means in english something like "right?" at the end of the question)
Then I guess I'll put a non Asian band's lyrics here too, because this really is odd. It's a finnish band, that's pretty popular outside Finland.
The 69 Eyes - Lost Boys
Actual lyrics: We are lost.
Misheard: We are gays. (

My english rules <3)
Nightwish - Wishmaster (also from Finland, our pride~ ^.^)
Actual lyrics: I'm not quite sure, and I mostly misheard words, not full sentences.
Misheard: Fishmaster,
hamster,
porn
Misheard lyrics are the most funniest thing ever, imo.