‘Diane Warren: Relentless’ Review: Doc Portrait Digs Into the Offbeat Personal Iconoclasm Behind All Those Mainstream Songs

variety.com:

Chris Willman Senior Music Writer and Chief Music Critic Not many non-performing contemporary songwriters are quite interesting enough to sustain a 90-minute documentary, but then, not many are Diane Warren, one of the great characters of modern Hollywood.

Despite having a self-owned song catalog whose worth is estimated at up to a half-billion dollars, and despite famously having 15 Oscar nominations and a lifetime achievement award, Warren still maintains the aura and attitude of a street hustler, as if every new tune she’s pitching to the studios or the stars is the one that’ll finally catch her a break.

You almost have to come up with a whole new multi-hyphenate descriptor to sum her up … something like mogul-urchin. The new documentary “Diane Warren: Relentless” goes a long way toward first recapping the broad strokes of her story, for those who are encountering her on the late side, and satisfying additional curiosities that may still be held by those already familiar with Warren’s Horatio Alger-worthy rise and 35-year plateau.

The subtitle comes as something of an understatement (it’s a polite abridgment of the “relentless as fuck” bracelet that Warren proudly shows off).