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According to our friends at ANIMAL, Poster Boy — who made headlines last year after remixing a major installation of subway ads by the MoMA — recently created some new work while in London for his War of Art book tour. Click through to check out a few before and afters from the “Matisse of subway-ad mash-ups,” and let us know what you think.

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Other new work from Poster Boy includes a tribute to Nick Walker, and a remix of a Sony ad that resembled street art.

All images via Graffoto Blog.