This seems like such an odd question to know about me, but I'll go with it anyways. Honestly, I don't listen to much music that would be considered mainstream, and if I do I usually consider it a guilty pleasure. Mumford and Sons, and Adele probably are mainstream, but I don't consider those guilty pleasures. I haven't turned on my radio to listen to the top 40 stations in forever so if anyone ever asked me what was trending besides those two I wouldn't know.
I don't have a problem with it though. People are into what they like, and if that's mainstream music then so be it. It just hasn't been much of my thing.