Q: how do i shuffle genre's

Hey espi24,

One way to look up and shuffle a whole genre of music in iOS 7 would be using the Search Music function.

In the music application, while browsing, tap the status bar to reveal the search field at the top of the screen, then enter your search text (for example, "Rock"). Then you can shuffle all those songs from there.

via: iPhone Music - Browse and play

http://help.apple.com/iphone/7/#/iph3cf21a82

Have a good one,

Delgadoh