Rihanna and Joan Rivers are at it… on twitter!

Few hours ago, the out spoken TV host said the Bajan pop-star was an “Idiot” for publicly admitting that she still loves ex-Chris Brown during Oprah’s Next Chapter interview.

Joan tweeted, “Rihanna confessed to Oprah Winfrey that she still loves Chris Brown. Idiot! Now it’s MY turn to slap her.”

Of course Rihanna is not one to take ish from no one… not even a senior citizen – fire back at Joan saying, “wow u really do get slow when you’re old huh?” before deleting… then adds, “Slap on some diapers”

Joan is a comedian, so perhaps she was joking about the first tweet, but got serious with the second one saying, “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!”

 Lets see if Rihanna would take up Joan’s offer to be a guest on the TV show…. 

Check the Tweet exchange below