It's always risky inviting a high-profile celebrity to your wedding (even if you're one yourself), when there's the chance your big day will be overshadowed by their presence (remember that Justin Timberlake/*NSYNC snub?). But when it does happen, it's usually the best kind of spectacle. Ahead, 30 celebrity wedding guests trying their best to be low-key or the opposite—being extra fabulous—because they can't help it. From Marie Clair
