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(TMZ) - Rihanna knows EXACTLY how to please a man - especially if that man is a waiter, because on Friday she gave one lucky server in Hollywood the biggest tip of his food-slangin' career. 

It all went down at the Laugh Factory comedy club. Rihanna was there with 6 of her friends, downing drinks and listening to Dane Cook tell jokes on stage.  

But when the bill came, a measly $80, TMZ reports that Rihanna asked her waiter what the biggest tip he ever received was. He said $100, so Rihanna slapped $200 into his hand and replied, "Now I'm your biggest tip."

If only he said $1,000...


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