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Rihanna, Joan Rivers

Frazer Harrison/Getty Images, Dan Herrick/KPA/ZUMA Press

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.

"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.