San Judas Tadeo.

Statue on the left; Jose Gregorio Hernandez, patron saint of medical students. Right; Saint Jude, patron saint of hopeless cases. 

Parts of Reforma closed to traffic.

Face transfers and fancy dress. 

The black one says 'protection against witchcraft'. Other favourites (not pictured) say 'Saint Antony and Saint Jude… Find me a boyfriend' and 'Saint Jude and Virgin Mary give us work, health, money and love'. 

Here's a great video my brother made about this a few years ago.