I guess they don't.
Panel 1: We start off with an exterior shot of the Tiny train House. A lavender blob says that Limo Number one is here.
Panel 2: As Liz climbs in, she informs an unseen person who asks if she's all right that she is but doesn't want to step on the Miracle Dress.
Panel 3: Shawna-Marie says "Let me help you", Dawn tells them not to mess up her hair, Candace asks who has the bouquet and Meredith wonders when she can get in.
Panel 4: Candace tells the mutant chauffeur that they're ready to go.
Panel 5: April says that they're rolling. This causes Liz to make a stupid pun about how she thinks it's going to be a smooth ride. This is because nobody is going to tell her about Jim until after the ceremony.
Summary: When she finds out, she'll look for someone to blame for ruining her big day. Poor April, she's going to be blamed for something she didn't start again.
I also expect to see a banner that shows us the wedding itself.