Lotsa Internet sites are claiming just now that The Insider‘s Lara Spencer already has been chosen to replace Mary Hart as host of Entertainment Tonight. I, too, heard the rumor that Spencer was contractually guaranteed the gig during her last negotiation. But not so fast… “It hasn’t been promised to her. Her people planted that,” an insider tells me. I hear CBS Corp CEO Les Moonves, and CBS Television Distribution President John Nogawski, and ET‘s producers “discussed that she would do The Insider and we would look at her and other candidates outside so there was total transparency.” Spencer might still get the gig: she has that chirpy cheerful quality TV execs choose. But, jeez, who cares? I don’t even know her name. And lame celeb shows like ET are a dime a dozen on the tube these days and suffer from the same blandness.