There must be something in the Hollywood air that is making pregnant celebrities marry their baby’s daddy. Last Saturday it was Ashlee Simpson and Pete Wentz. Today it is Jessica Alba and Cash Warren, who are due to have a baby girl this summer. I would ask if Angelina Jolie and Brad Pitt are next, but that would just be an example of a stupid question. As with Ashlee and Pete’s wedding, Jessica Alba and Cash Warren opted for a small...