She's just a small dog trying to make it in the big city. Vivian's human, Mitch, takes these great photos of her and uses photoshop to make her the focus of the image. Mitch is also working on a children's book starring Vivian, which you can find out more about on Kickstarter.
We can't decide if this is a typical thing that happens in New York or if this is the most spoiled dog ever. Either way, it's good to know that Luigi is living his best life.
If you're not familiar with The Dogist, it's a photo-documentary series on Instagram about the beauty of dogs! It's kind of like Humans of New York, but with pups. Some posts are captioned with quotes from their humans or details about their life, but the photos manage to tell a story on their own.