Diane Warren is sitting in her Hollywood studio wearing a High Fucking Standards long-sleeved t-shirt. “I have high fucking standards. I really do,” she says when asked what the meaning behind her top is. And she does. Especially when it comes to her songwriting, choosing singers — “I’m like a casting director” — and when it comes to her publishing rights. 'The Great British Bake Off' Judge Prue Leith Exits Series: 'Now Feels Like the Right Time' Warren founded and controls Realsongs, holding