Joan Rivers Continues Cruel Twitter Attacks On Perfectly Nice Actresses

Today in Tweet Beat, we discover that the cats who played Salem on Sabrina, The Teenage Witch are still alive and kicking, Roseanne's Nuts has been axed, and Mike Tyson explains why he bit off Evander Holyfield's ear. Plus, another day, another perfectly-nice actress being slammed by Joan Rivers. What gives, Joan?