Sneak Peek of Smash: Katharine McPhee's Karen Sings Adele's "Rumor Has It" (VIDEO)

 Karen Cartwright (Katharine McPhee) performs a cover of Adele's hit, "Rumor Has It" on an upcoming episode of NBC's Smash. The full performance won't air until a later episode, but you can already get a sneak peek at what to expect.


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