25. Niall O'Brien

O'Brien may be known by still very few, but his work gradually gained more international exposure in 2011. The Irish photographer brought his Good Rats series - a powerful set of images documenting a group of proper punks - to New York's No. 10 Gallery from September 13 through October 12. He's already won an ICI Photographer of the Year award, and our best bet is that this young artist will be on the rise through 2012.