There was no way that Keith was going to miss his chance to give Marissa her first Christmas present from him in person.  That was the reason he had gone to Gotham City in the first place.  So, after texting Marissa to find out what Christmas party she was expected to attend, Keith dressed up for the occasion and grabbed her necklace, which he put in a Christmas jewelry box.  He arrived at the party in a fancy Gotham hotel and waded through the press and the guests to find his one and only Marissa Wayne.