Brooklyn street art
A real piece of art, that is what street art looks like. But not everybody thinks so, because it isn’t art that you expect in a museum. It is real street art. It is hipster art! The term street art can include traditional graffiti artwork, sculpture, stencil graffiti, sticker art, wheat pasting and street poster art, video projection, art intervention, flash mobbing, LED art, mosaic, murals and street installations. Typically, the term street art or the more specific post-graffiti is used to distinguish contemporary public-space artwork from territorial graffiti, vandalism, and corporate art.
Street art can be shown on any way, not only abstract. Using paper, paint, old paintings, street signs, etc. These pictures(the 'televox' and the traffic light) show that the artist not only uses paint but also already existing things. 
Another way to make a nice piece of art is using other ones art. Painting over painting over painting creates a nice mixture of different artists and different art pieces. 
LED Art is form of light art constructed from light-emitting diodes. Many artists that use LEDs are guerilla artists, incorporating LEDs to produce temporary pieces in public places. LEDs are very inexpensive to purchase and have become a new way to make street art. LEDs are, among others, used in installation art, sculptural pieces and interactive artworks. 
And of course you have a mixture of different styles. This done by using two or more street art styles. Like shown in the picture.
A good movie of showing different street art styles is the following one:
Artists have challenged art by situating it in non-art contexts. ‘Street’ artists do not aspire to change the definition of an artwork, but rather to question the existing environment with its own language. They attempt to have their work communicate with everyday people about socially relevant themes in ways that are informed by esthetic values without being imprisoned by them. John Fekner defines street art as “all art on the street that’s not graffiti.”
To have a good impression on the real life street art and to be up to date by real street artists have a look at this blog:
