Different styles of art is used a lot by bands to represent their genre of music and make them stand out.
For example, Blur got Banksy to design the cover of their album, Think Tank.
The style of the dripping paint and the black & white stencil graffiti style imagery made me think of Green Day's album artwork for 21st Century Breakdown and Shenanigans.
I love how the words are layered into the picture and how the red lines give the idea of the American flag.
In their music video for 21st Century Breakdown they use a street art style with the brick walls in the background and the black & white stencil style images.
In 2009, before the release of 21st Century Breakdown, they commissioned a group of artist to do an exhibition inspired by the songs from their new album. These are some the pieces that were produced.
I think the street art style artwork works very well for Green Day because it represents the rebelliousness of their lyrics and music genre. It also gives a sense of mystery and secrecy to the band, if someone hasn't seen or heard of them before, when they pick up their album they don't see the faces of the bands or artist who made it which makes it more interesting and eye-catching. Rather than having a dull posed picture of the band the artwork gives people an idea what the album and music is all about. It will either appeal to someone and encourage them to buy the album or it won't.
Other album covers with urban /street art style, these bands have very different music genres but I like how they have used a style that represents the music on their album. For example, Snow Patrol use a couple walking together in snow gear, their music is mainly about love and relationships and the outfits have connotations with the bands name.