Miss Universe reveals the secret behind her #LavaWalk

Checking her phone during her photo shoot for The Post, Miss Universe Catriona Gray audibly gasped. Turns out, Tyra Banks had given her a shout-out on Twitter, writing, "Can't stop thinking about that #LavaWalk." The supermodel was referring to Gray's slo-mo runway strut that helped her nab the crown -- and went viral. "She's just...