On the upcoming fourth episode of the new NBC musical drama series SMASH, Katharine McPhee will perform Adele's Grammy-winning song 'Rumor Has It'. McPhee's character 'Karen' and her cast members from the fictional production of 'Marilyn' will take to the stage to perform the popular hit song.
SOURCE: BroadwayWorld at 01:03PM on February 14, 2012