Uggie -- the adorable, four-legged, scene-stealing star of "The Artist" -- and his trainer drop in to TMZ Live today ... and explain why Uggie is canine-not-grata at the Oscars. You've got to see Harvey's heartfelt plea to get Uggie into the show. Plus, "Xena: Warrior Princess" star Lucy Lawless calls in from high atop a oil tanker to talk about her valiant Greenpeace protest ... and her team's first run-in with the cops that will soon arrest them. And, Chris Brown is in deep you-know-what -- his accusers were caught on video telling cops how he allegedly stole a cell phone ... and everyone agrees they sound 100% believable.