Who is Bruno Mars and..?

Bruno Mars is a singer and multi talented musician. His voice is greater than his generic songs imo. The other two aren't worth mentioning. Ke$ha is a skank and the other one is a joke. I live under a rock as well and the only time I hear about the other two is on Yahoo Answers. I guess a lot of people in my life chose to live under rocks these days. The music industry and simply society is really shallow and boring.