In reply to Faf.

* ARIANA CANNOT SELL THE SINGLES RHANNA SELLS OR ALBUMS BEYONCE SELL.

Also, there are plenty of places to showcase RNB artistss but the labels dont have a crossover strategy except Columbia Records.
They can showcase black RNB artsts the same exact places they showcase Sam Smith...
both pop and urban radio formats, GMA, Today SHow, mainstream music festivals, MTV award, BET Awards, Kimmel , Fallon, etc... they labesl just dont want to do the same for black RNB artists.
Columbia has done well wth John Legend, Beyonce, and Pharell.