Williams recorded new track Say Yes! with Beyonce and Kelly Rowland last month (May14), and now the trio has regrouped for the accompanying promo.
At first it appears the threesome shot their scenes separately, but the former bandmates' reunion comes together as the ladies dance with one another at a party.
Williams says, "We had so much fun. Sometimes the director or production assistants had to say, like, 'Ok, girls, bring it back home. Bring it back together'. When we were together, we go back to how we were when we were younger, just always laughing and talking about things. It's been a great moment."
The track will appear on Williams' upcoming third solo album, Journey to Freedom.