No, Rihanna is from Barbados and does not speak Jamaican Patois.
Jamaican Patois. It's known locally as Patois (Patwa).
In Jamaican Patois, you can say "big up yuhself" or "bless up" as a way to say thank you.
King
In some dialects of Jamaican Patois, "children" is often said as "pickney" or "pickney dem."
In Jamaican Patois, "master" can be translated as "Massa."
In Jamaican Patois, "good day" is said as "good mawnin."
missya
you are beautiful
pizza
Irie is Patois (Jamaican Slang) for good or all right.
In Jamaican Patois, "You're welcome" can be said as "Nuh problem" or "No trouble".