New couple alert? Rihanna’s getting chummy with Rob Kardashian! (PICS)

Rihanna opened up to Oprah about her relationship with Chris Brown and a lot of people were disgusted that she admitted to still being in love with him. Joan Rivers is lashing out on Twitter with her distaste for Rihanna’s confession.

She ignited a war with Rihanna when she tweeted, “Rihanna confessed to Oprah Winfrey that she still loves Chris Brown. Idiot! Now it’s MY turn to slap her.” Rihanna responded with some old lady comments, tweeting, “Joan Rivers wow u really do get slow when you’re old huh?” Then she deleted that one, but replaced it with this . . . “Slap on some diapers.”

Then Rihanna ran off and spent the weekend with a man that’s too lazy to slap her. She spent all day on Saturday with Rob Kardashian.

They went go-kart racing during the day and hit up the Playhouse nightclub in Hollywood later that night. Rob does already have a girlfriend. He’s been dating Rita Ora since December and they recently got each other’s names tattooed on their hands.

But it’s not like having a girlfriend is going to stop Rihanna. Just ask Chris Brown’s other half, Karrueche Tran.

Here’s the go kart date!

Here’s the club date. What is she passing him?

And here’s Rihanna kissing up to Rob’s girlfriend, Rita Ora. This pic was taken before Rihanna and Rob’s date.