Rihanna and Joan Rivers Go Head-to-Head on Twitter

Rihanna was not amused when Joan Rivers talked that talk about her interview with Oprah Winfrey.

The superstar singer and the Fashion Police host had a heated exchange on the social networking site Friday, after Rivers called Rihanna an "idiot" for revealing she still had feelings for ex-Chris Brown in the Next Chapter sit-down.

Check out Rihanna's hot Tom Ford gold chain wedges

"Rihanna confessed to Oprah Winfrey that she still loves Chris Brown. Idiot! Now it's MY turn to slap her," Rivers tweeted.

Rihanna quickly responded, saying, "@Joan_Rivers wow u really do get slow when you're old huh?"

She later deleted that message, but wrote, "Slap on some diapers," and kept that one up.

Rivers later quipped, "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!"

Something tells us it may be a while before the Bajan beauty takes Rivers up on that offer.