Heidi Klum quickly went from Project Runway host with a NY Fashion Week show (season finale show spoilers) to busy mom hosting a celebrity babies bonanza at her house in LA on Saturday. It was her son Henry's third birthday and, like most Klum-Samuel affairs, costumes were required! Debra Messing brought along her son, Roman, while Victoria Beckham arrived with her youngest, Cruz. Even Kingston Rossdale was able to fit the celebration into his busy schedule, stopping by after he hit up Jayden James and Sean Preston Federline's joint party. Since Henry sports his superhero gear on a regular basis, he must have been dressed up in something extra special on his big day.