The Destiny's Child bandmates reunited to celebrate the launch of Kelly Rowland's new book, "Whoa, Baby!" Bey posted a photo of the former girl group on Instagram. The photograph marks the first time the BFFs have been spotted together since November when they showed off the Mannequin Challenge. "We are truly sisters. They are my sisters. I talk to them, I seek advice from them, I call them when I need them, when I don't need them I call them, when I want a girl's night. I call them for everything," Rowland told Vogue Australia.