Beyoncé fans were in for a treat on Tuesday as they got a rare glimpse at the singer's daughters with rapper Jay-Z in the latest campaign video for Ivy Park.MORE: Has Beyoncé upgraded her $5m engagement ring from husband Jay-Z?The clip dropped on the brand's official Instagram account and featured children of famous parents, including Kobe and Vanessa Bryant's daughter, Natalia, and Ryan Phillippe's and Reese Witherspoon's children, Ava and Deacon Phillippe.WATCH: Beyoncé's daughters Rumi and