I think it is fake. Look at the can above HIS right eye. An inch below the silver top, the blue can turns purple and white???? And the hair "touching" his right ear lobe isn't natural looking (for a wig).
Conclusion - good but not great photoshop attempt. still funny.
The only reason people think it is fake is because the writer of the article created inaccuracy. I don't think the whole article is a sham, therefore, this one is real. Plus the color temperature is consistent throughout the image. Its a cool work of art and i wish they wouldn't have equated it to gaga.