Valentine’s Day and New Year’s Eve director Garry Marshall continues his obsession with star-studded gift cards by announcing Mother’s Day. Where in the calendar should he circle now? Ready the horsemen. This week has seen the news that Valentine’s Day and New Year’s Eve will be followed by Mother’s Day, a new star-studded pile of froth which will become the third chapter of Garry Marshall’s holiday-based trilogy.The stars are already signing on (Julia Roberts, Jennifer Aniston, Kate Hudson and Jason Sudeikis so far) for a film with a similar plotline to the last two efforts (rich folk with perfect skin do some things in the space of a day) based on a script by someone who wrote Monster-In-Law.