Shia LaBeouf is either totally losing his mind ... or losing his mind for art's sake. We had a close encounter with him during his latest "art" display, and it begs the question: Is he going nuts? Plus, Lindsay Lohan gives the performance of a lifetime ... on a karaoke stage. One staffer says this is the beginning of her journey to Oscar glory. And, Jerry Seinfeld says he doesn't care about racial diversity in comedy -- Arsenio Hall joins us to defend him ... and to drop the best O.J. Simpson joke we've heard in a long time.