"I knew I wanted [the album] to be visceral and urgent. I knew I wanted it to be celebratory and festive," said Williams, 40. "It's the album I've always dreamt of making… It's a love story, and that's why the album is made for human beings, it's made for everyone. It's just that my muse were women."
Check out the video for more from Pharrell, including what he looks for when seeking collaborators.
GIRL is on sale now online and in retail stores nationwide.