Relentless' is an engaging portrait of a top writer who has come to be a mogul but still acts like a song hustler.

Billboard can exclusively announce that her upcoming single "Woman Up" is arriving first thing Friday (June 7), and it was written alongside Grammy-winning songwriting icon Diane Warren.

Songwriter Diane Warren has been nominated for an Oscar 15 times, but has never won. She could be looking at a 16th nomination in the coming days as her new documentary arrives in theaters. Diane ...