Jennifer Aniston is fuming with singer Pink because she believes she called her "stupid". The former 'Friends' star is reportedly furious with Pink after the singer made a veiled attack against Jennifer during a conversation with the actress' boyfriend John Mayer. Pink, 29, explained: "I got into an argument with him. He said something along the lines of, 'I only shag really stupid women', and I said, 'I guess they would have to be.' "I don't get him and Jennifer at all." Jennifer is said to be so furious with the 'So What' singer's comments she has ordered her friends not to speak to her. A source told Britain's Daily Star newspaper: "She's livid that Pink would suggest she is stupid like that in public. But Pink was actually defending Jennifer - John infuriated her by talking about women like that. "Jennifer has already made it quite clear that Pink is to be blacklisted among her circle." Jennifer, 39, and John, 31, reconciled earlier this month. They originally split up in September after dating for around three months.