Joan Rivers — who's about to become my new co-worker — is returning to Las Vegas for the first time in nearly a decade. The red-carpet hellraiser will perform her shtick for four nights at the Stardust hotel-casino beginning Wednesday. Speaking of Joan and Melissa's big move to the TV Guide Channel, the pair reportedly signed a three-year deal worth between $6 million and $8 million. In addition to their trademark award-show duties, they will also host a series of holiday specials and lifestyle shows. Missy is also rumored to be in talks to join the Watercooler team as a weekend substitute.