YOU SAID:

I have a song stuck my head.

INTO JAPANESE

私は歌が頭につきました。

BACK INTO ENGLISH

I have a song on my head.

INTO JAPANESE

頭の上に歌があります。

BACK INTO ENGLISH

There is a song on the head.

INTO JAPANESE

頭の上に歌があります。

BACK INTO ENGLISH

There is a song on the head.