It's definitely not a coincidence

I don't know why the girls are even trying that.
She's written his lyrics on her arm twice... obviously a big fan... and clearly has heard the song.
I agree it's likely just a dedication to him. Dunno why he's butt hurt, as if she stole the whole premise of his songs. Probably just wants to cause some mini "storm" for publicity and to claim someone relevant actually used his work.