Just had an epiphany that Rihanna will never be over. I just went through about 1.5 hours of her music videos and her voice is just at that sweet spot between soulful and pop friendly. She can do any music.
Needed Me, We Found Love, and Work. So different yet her voice works on all of them. Hell even throw in Stay and you start to understand the full extent of her vocal capacity (not talking about technicality tho hehe...she's a mediocre singer). Very versatile.
As long as there's music to be made (and she remains beautiful) Rihanna will be successful in one way or another. I can see her pulling a Hung Up by Madonna or Believe by Cher even when she's old. Her voice is just that sweet.