Khloe Kardashian is reportedly pissed that Ray J and comedian Joan Rivers mocked the infamous Kim Kardashian/Ray J sex tape. To promote her WEtv show "Joan & Melissa: Joan Knows Best?," Rivers and the R&B singer pretended to have sex in a bedroom scene very similar to the one that appeared in "Kim Kardashian Superstar."

The "Joan Rivers Superstar" tape was all fun-and-games but apparently Khloe Kardashian was upset and at the last minute canceled her appearance on E!'s "Fashion Police," which Rivers co-hosts. Sources told TMZ that the cancelation left the show in a panic because they had to quickly find a new replacement and rewrite the script.

After Rivers and Ray J faked it for the camera the two sat down in a mock reality TV-like interview and talked about the benefits of a younger man dating an older woman.

"I like older women because they know that they want, they know when they want it, and after they get it then they tell you to get out," the singer explained.

"But then I think it's, we know what we want and usually it's dinner at 4:30," Rivers added.

"Yes. And I'm good with that because when I take you to dinner, after dinner it's 6:30," Ray J continued. "We hit the bed by 7:30 p.m., you sleep by 9, I'm in the club by 12. Hello! we got a perfect relationship."

No matter how long it's been since the sex tape was released (seven years ago), 33-year-old Kim can't seem to fully put it behind her. Last year, Ray J made headlines - and pissed off Kanye West - when he released the single "I Hit it First."

The song and accompanying video were clearly about the tape he made with his ex-girlfriend. At first he refused to admit that the song was about the reality star but finally opened up about it during an appearance on "The Wendy Williams Show."

The talk show host asked the singer if he was still denying that the song was about Kim Kardashian.

"I never denied it," he said. "I just felt like in the promotional campaign to go so hard after you kind of know what the song is about... so, I just let the song speak for itself."