COURTENEY COX has blasted US reports that her best friend JENNIFER ANISTON is making wedding plans with VINCE VAUGHN, insisting “she’s not engaged”. American publication Us Weekly printed the story about the couple’s mid-air engagement last week, but Aniston’s former FRIENDS co-star has told rival Life + Style the reports are untrue. Asked at a charity event yesterday if Aniston was planning to become Mrs Vaughn, Cox said, “No, she’s not.”