Diane Warren has an incredible songwriting career and documentary, "Relentless". She talks to USA TODAY about it all.

Songwriter Diane Warren will do anything to get a great singer to record one of her tunes – up to and including latching onto their leg and refusing to let go until they agree. Such was the case with ...

When it came time to recruit a singer for "Dear Me," which Diane Warren wrote to her "younger f*cked up self," the record-breaking Oscar nominee called on Kesha not just for her vocals but also ...