Photo of the Day: January 20, 2016

LONDON, ENGLAND - JANUARY 18: The Color Run Presented by Skittles, known as the 'Happiest 5K on the Planet' cheers up commuters in central London giving them something to smile about on 'Blue Monday', the most depressing day of the year, on January 18, 2016 in London, England. (Photo by Tristan Fewings/Getty Images for The Color Run)