They’re called the “vocal trinity”: Whitney Houston, Mariah Carey and Céline Dion are the first divas of the pop era. But what defines a diva?

The story of the iconic singer’s fascinating six-decade career in both music and Black and LGBTQ activism.

The unmistakable voice of Whitney Houston is powerful and timeless. She reached the pinnacle of pop success becoming one of the most accomplished recording artists of all time. But her…