Shepard Fairey is one of my favourite modern street artists. His art revolves around politics, our fears, the issues we don't want to confront, and his execution is always simple, yet bold and powerful. This man knows how to make a statement. His Obey Giant campaign, started in 1989, changed people's perspective on street art. However, his Hope campaign (Barack Obama) from 2008--which I'm sure most, if not all of you, are familiar with--took his popularity to a whole new level.
He is currently doing a May Day exhibition at Deitch. Read more about that here.
Images from his website, www.obeygiant.com. Check it out!