Gorgeous photos from the weddings of Julia Roberts, Jessica Simpson & Nick Lachey, Matt le Blanc, Russell Crowe, Trista & Ryan, Paul McCartney and Liv Tyler, among others, will make this book a treasure to keep. So will the details that only People magazine can provide: What were the favorite celebrity wedding songs? What gifts would you find on the stars' wedding registries? Who got the wackiest present? Who had the most moving vows? Who had the craziest ceremony? All the answers are here.