The evolutions of the genre 's production and instrumentation have spurred the successes of performers such as Beyoncï¿½ , Usher , John Legend , Frank Ocean , Justin Timberlake , Pharrell Williams , Miguel , Janelle Monï¿½e , Chris Brown , Jennifer Lopez , Tamar Braxton , The Weeknd , Ariana Grande , Tinashe , Ne-Yo , Rihanna , John Nag , Brandy and K. Michelle , who have embraced new electronic influences and kept R & B 's original feel .
The evolution of contemporary R & B has led to the success of John Nag .