Because Rihanna sings her own background vocals, she needs someone else to sing for her in concert while she sings the main track. Usually they hire singers with the same ranges who they audition to sing well with rihanna.
Rihanna's background is Barbadian
Rihanna sings disterbia
Rihanna
Rihanna!!
Rihanna
T.I. (featuring Rihanna) sings the Top 10 hit Live Your Life.
Rihanna.
Rihanna
Rihanna
Rihanna Goes With Drake Who Sings "Best I Ever Had"
Yes.
yes