As a member of the Kardashian clan, Mason has to fly a lot. In fact, he was up in the air before he turned 3 months old. "On the plane, we napped together. We shared headphones and watched and danced to the Michael Jackson documentary 'This Is It!'" mom Kourtney blogged on People. "Mason didn't make a peep, not even the slightest start of a cry. By the end of the flight, every person who had looked terrified when they saw we were bringing a baby on board told us that he was the best baby they had ever seen fly." A pro from the get-go!