'Billie Holiday' star Andra Day on what helped her most to play the real-life jazz singer

In director Lee Daniels' adaptation, Day plays Holiday in the last years of her life as addiction and hardship have worn her down.

"Google, I guess, proved to be the most useful [tool]. Reading, like every book that I could. But there's particularly there is a clip on YouTube where Billie is just sort of talking with her band," Day described to Fox News while promoting the film. "She's talking with the players and with the arrangers. And she's just kind of shooting the s--t. She's in her headspace. She's singing," the "Rise Up" singer continued. "Telling stories, laughing, just talking."