Johansson ex writes a song about her

The Steel Train singer accuses the Lost In Translation beauty her of letting fame go to her head.

He even names her in the song Better Love: "This girl had it kinda sweet / Till fame swept her off her feet / She sees nothing she did before / Hey, Scarlett, you're not the same."

But the angry outburst has caused friction with Antonoff's bandmates.

Bassist Matt Goldman says, "Jack sometimes wishes he hadn't named her because everyone asks about that. It's the first question they ask. And that's not what we are about."