There is a fact that people have different taste. And I use to ask why would a lot of folks listen to a lot of crap back, but then I realized music is music. Also, a good song is a good no matter who is from. I don't know why people listen to bad pop music, of which there is a lot, but the reason people listen to good pop music is that it is like candy for the ears: it doesn't have substance, but it's pleasant and enjoyable. Take, for example, the song "Umbrella" by Rihanna. Is a great type of musical art? No, but it's catchy and fun, and that's enough.
People love hearing the pop music because they can, and they have different tastes in music, some people love rock music or country music, etc. And you might realize that it your choice, no one can make me change your mind about what music you listen to. Therefore, no matter what kind of music you are listening to, just enjoy it with all of the love.