Hilton, 23, refused to give details, but according to friends, the split was a result of a jealousy campaign orchestrated by Richie.
Paris said in a statement: "Its no big secret that Nicole and I are no longer friends. I will not go into the details of what happened. All I will say is that Nicole knows what she did and that’s all I am ever going to say about it."
According to the New York Daily News, Richie organized a party at the apartment of Paris’ sister, Nicky, to watch an episode of Saturday Night Live hosted by Paris. Instead, what friends saw that night was the video of the amatuer pornographic video starring Hilton that was discovered last year, and posted on the internet.