Joan Rivers has landed herself smack dab in the middle of a war-of-words with Rihanna after posted a rude remark about the singer's interview with Oprah. Joan tweeted her opinion on the confession RiRi made to Oprah about how she still loves Chris Brown despite the brutal attack she suffered at his hands, writing, "Rihanna confessed to Oprah Winfrey that she still loves Chris Brown. Idiot! Now it's MY turn to slap her."

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It didn't take Rihanna long to fire back, taking to Twitter herself to give Joan a taste of her own medicine. "@Joan_Rivers wow u really do get slow when you're old huh?," Rihanna tweeted. Adding, "Slap on some diapers." 

Joan then responded with, "Honey, @Rihanna, everyone knows: If he hit you once, he'll hit you again. Read the statistics. PS - Love to have you on Fashion Police!"

Crazy.... Right? Wonder if Rihanna will have anything else to say.

What do you think of Joan's remarks... Needed to be said or out of line?

Photos courtesy of Fame/Flynet