Can you keep a secret? Planning a birthday party for someone you care for is always a good time, but it's so much more fun when they don't even know that you're planning it! Celebrate your loved one's birthday and surprise them with a huge party in their honor with this collection of surprise party invitations that will make sure your guests know that it's a surprise and to keep their lips zipped! Choose from a variety of surprise invitation styles depending on the birthday honoree's unique personality and party style. Choose from stylish invitations that picture party people with their lips hushing about a secret, SURPRISE themed invitations, birthday cake invitations, ticket stub invitations, die-cut lips invitations and more. Be sure to let your guest know what time the honoree will arrive on your invitation so that everyone can get there in time to shout "SURPRISE!"