(Note: The interview took place prior to Sunday’s awards show.)

Particularly, Day gets into how thelookof Lady Day helped her to find the soul of the character.

The actress viewed Holiday’s glamorous looks as defiance, starting with her diamond jewelry.

THE UNITED STATES VS. BILLIE HOLIDAY

Takashi Seida/Paramount Pictures

And when it came to performance scenes, Holiday’s iconic flower sealed the deal.

“As the flower went on, that was like the cake,” Day says with a laugh.

“I felt like myself and very much like her.

So it felt like home a bit, but a crazier home.”