If you're not sure what I'm talking about let me give you a brief rundown: Beyoncé, Jay, and Beyoncé's mom were all born on the 4th, Bey and Jay were married on the 4th in 2008 (8 divided by 2 is 4, as Beyoncé said herself), and Blue has the name "Ivy" because IV is the roman numeral for... you guessed it, the number four.