Blake Shelton, Gwen Stefani, Kelly Clarkson, and John Legend ("The Voice"); Jeanne Mai rehearses for "Dancing with the Stars"; an interview with Kate Hudson; Robert Lacey on "Battle of Brothers", his book about the rift between Prince William and Prince Harry; Lea Thompson on 35th anniversary of "Back to the Future"; producer Shawn Levy ("Unsolved Mysteries" and "Stranger Things);—anonymous