The 24-year-old 'Diamonds' singer caused a stir at the Laugh Factory Comedy Club here when she gave the handsome amount to a staff during a night out with her friends, reported TMZ online.
When the waiter came over, Rihanna asked him what his biggest tip ever was, to which he replied "USD 100".
She then thrust USD 200 into his hand and said, "Now I'm your biggest tip!"
Rihanna, who is believed to be back with her on-off boyfriend Chris Brown, is known for her wild nights out.
