Rita Ora refused to say Rob Kardashian’s name during a radio interview in Australia on Friday, and even pretended not to know who he is. In December 2012, the two "split" after dating for a number of months, and Kardashian went on a Twitter rant about her.

“She cheated on me with nearly 20 dudes while we were together, I wonder how many she will sleep with now that we apart [sic]? But I mean 20?!!!” He also wrote that he was disgusted that a woman could "give up her body" to 20 men in one year. His sister, Khloe Kardashian, tried to calm Rob down, tweeting, "Rob be nice kiddddd." He has since deleted all of the tweets. 

When asked about Kardashian on the radio show Friday, Ora said, "I've got no idea what or who you're talking about," before laughing. Last March, the singer even asserted that she never even thought of Kardashian as her boyfriend.

“I never actually thought it was a relationship in all honesty. I never mentally defined it as boyfriend/girlfriend. When I split up with him I said ‘it’s because I’m never there, I don’t know how to do it.’ That’s all I said … then the rest happened.”

Kardashian later admitted that he may have exaggerated the truth about Ora cheating out of anger.

"I posted what I posted to keep myself from taking her back. Every time she messed up, I took her back for over a year now," he said. "I just had to do that to make her hate me," he said on his reality show.

Ora has since moved on with DJ Calvin Harris.