"The Insider" was behind the scenes with the cast Monday as they celebrated the 100th-episode milestone. Jane Lynch told us that this would be one show with a lot of star power. "Kristin Chenoweth is back and Gwyneth Paltrow is back," she said. "And they are hatching plans in order to get the glee club back." While there will certainly be lots of stars on the show, Matthew Morrison admitted that the event is bittersweet without co-star Cory Monteith. "The very first season it was me and Cory Monteith,"