Lyric discussion by indierod 

Cover art for Factory Girl lyrics by Rolling Stones, The

I thought Warhol's factory too, knees too fat makes me think maybe Holly Woodlawn or Brigid Berlin?

@indierod Personally don't think there was any particular female in mind. I think it was more about the song than someone, but I didn't write it and haven't looked for what Jagger or Richards may have said about the inspiration so I don't know.

As for the Irish/American thing, it's definitely got an Appalachia feel to it, and Appalachian music having derived primarily from the British Isles, it's not surprising that it could also have an Irish feel. With those traditional Irish instruments conga and tabla.