Wedding Guest Etiquette

Brittney Spears' sister, Jamie Lynn, and their mom, Lynne, both wore white to Jamie Lynn's wedding recently, Yahoo! Shine reports.

Lynne broke the cardinal rule of weddings, which is the bride is the only one who can wear whilte. But they shopped together so we guess it was OK...or was it?

Do you have your own set of DOs and DON'Ts for weddings? Share them with us!