Magician David Copperfield was taken to the hospital Friday after collapsing during rehearsals for his CBS special, David Copperfield: Tornado of Fire. According to the star's rep, he had gone without sleep for 48 hours and was exhausted. Tornado will still air Tuesday night as scheduled... Valerie Bertinelli has joined the cast of CBS's lagging Touched by an Angel, playing a new angel. She first appears in the April 29 episode, and if all goes well, could return full-time next fall, Variety reports... Former Saturday Night Live scene-stealer Molly Shannon is in talks to co-star with Tara Reid and Ashton Kutcher in the big screen comedy The Guest... Lisa Marie Presley has split with her rocker fiancé John Oszajca. — Michael Ausiello and Daniel R. Coleridge