Mary-Kate and Ashley are planning the best Sweet Sixteen party of all time - they just need to find a venue! Mary-Kate and Ashley's plans have changed for their Sweet Sixteen party - BIG time. After a disaster with posting the invitations to the wrong people, they hit on the tantalising teaser idea of sending everyone regular updates on the venue and theme. But time is running out - they haven't found a venue yet, and all their friends are expecting the greatest party of all time...