Target Audience Research: Who are the specific audience for particular products?

The audience for Rock music generally is male teenagers who wear black/dark clothing an example of this would be Nirvana fans:

 They have the sort of teenage rebellious image of the 90's rock era that Nirvana was a part of. This image has managed to transcend itself through time as even with more current rock artists this is the audience that the artist tends to have.

Another example would be Muse fans, Muse fans are predominately white male teenagers who dress in dark clothes and seem quite rebellious

  As can be seen in the picture Muse's fan base is predominately white male teenagers who dress in dark clothes however there are some exceptions to this some of them in this picture are wearing brighter clothing and look less rebellious than the others.

Muse also have quite a large female audience however this depends on the female rocker chick type of audience so girls in their late teens and young adults to about mid 30's 

  Once again you can see that their female audience much like their male audience they also predominately white.