15. Soulful superstar Bruno Mars likes mixing up his music with rap collaborators This image appears in the gallery:What A Load Of Rap! 20 ICONIC Moments Where Pop Got Dirrrrrty 15. 15. Soulful superstar Bruno Mars likes mixing up his music with rap collaborators 20 images See the full gallery: What A Load Of Rap! 20 ICONIC Moments Where Pop Got Dirrrrrty