YOU SAID:

You wear a cat on your head

INTO JAPANESE

頭に猫をかぶっているね

BACK INTO ENGLISH

you have a cat on your head

INTO JAPANESE

頭に猫が乗っていますね

BACK INTO ENGLISH

I have a cat on my head

INTO JAPANESE

頭に猫が乗っています

BACK INTO ENGLISH

cat on head

INTO JAPANESE

頭の上の猫

BACK INTO ENGLISH

cat on head