Kate Middleton graced the cover of four celebrity weeklies last week (PEOPLE, Us, Star and OK!), yet, with the exception of PEOPLE, the beautiful soon-to-be royal turned out to be a bust, selling fewer issues than average for the remaining three tabloids.

"Everyone hoped that Kate would be the new Kim Kardashian. Someone that almost guaranteed great sales," one editor-in-chief tells me. "However, Kate turned out to be a disaster. She sold so few magazine that you shouldn't expect to see her face on another cover for a long time."