Our pal Michael Musto, author of the Paris Hilton cover story in Out mag’s “Hot Issue,” tells us he asked her if her song “Jealousy” (a lament to a friend who betrayed her) might possibly be about someone with the initials NR.

“She said ‘No comment,'” says Musto. “I said, ‘I meant Nancy Reagan.’ (Nancy, after all, is a friend of the family.) She said ‘Yeah, right!’ Later on, thanks to my stunning inquisition techniques, Paris admitted the song is about Nicole. ‘It makes me sad because Nicole was like my sister,’ she said. ‘She dropped all her old friends and now she’s someone else. That’s not the girl I know.'”