In a room full of stars at Madison Square Garden, it was 6-year-old Blue Ivy Carter who caught everyone’s attention. In a hilarious moment at the Grammys, she turned to her parents, Beyonce and Jay-Z, and told them to stop clapping. Her precociousness became a trending topic on Twitter. “Blue Ivy's the only person who can shush two legends at the same time,” one tweet read. Her glittery Mary Jane shoes are also getting lots of attention.