U.S. Transportation Secretary Pete Buttigieg and his husband Chasten celebrated their twins' birthday recently with a crowded soiree, the former mayor and presidential candidate told James Corden during an appearance on The Late Late Show with James Corden that aired after midnight Thursday."Our son Joseph — we call him Gus — our daughter, Penelope; they just turned one year old, and it's just the best thing in the world," Buttigieg told Corden to cheers and applause from the studio audience.He explained that Chasten, 33, had planned a party for the kids that featured "more guests than we could fit in the house, so we opened up our garage...put the tables out there...turned the driveway into a little zone for the party."To see how the toddlers would react to their first experience with cake, the Buttigiegs bought them tiny smash cakes.The twins understood the assignment."We have a photo of them experiencing cake for the first time, and it looks like they are absolutely loving it," Corden said.Corden revealed, to loud "awws," photos of Gus and Penelope absolutely covered in cake with absolutely no care in the world.The proud father of two, Buttigieg, 40, said he thinks Gus is thinking at the moment that photos captured, "I've gotta think he's thinkin' I hope this is what being one year old is all about.