There should be a "I like some of it" option. Lady Gaga is a really talented musician. Ke$ha, not so much. Justin Bieber, no thanks. Rihanna and Katy Perry, okay sometimes. Black Eyed Peas made some good stuff. Britney Spears isn't doing anything interesting anymore. Beyonce is sometimes good. Those are about all the pop musicians relevant to me right now.
Have a listen to this:
<a href="http://www.youtube.com/watch?v=oP8SrlbpJ5A">YouTube Link</a>
It's a pop musician, singing a pop song, but it's not really pop music you're listening to. Pop music these days needs to be danceable, and sometimes that sacrifices the musicality of a song, or even the musician themselves. But usually it's still nice to listen to (in my opinion of course).