Jessica Alba, Gwyneth Paltrow, Alicia Keys and Heidi Klum. These four celebrities have one thing in common (other than being filthy rich, super talented and gorgeous), and it’s that they were all pregnant while walking down the aisle. Whether planned or not, sometimes babies just happen, but that shouldn’t be a reason to hold off on your wedding. If anything, it might just make it that more special, but you’ve got to plan ahead and plan well. Here’s how to prep for your w