megan hilty katharine mcphee smash nbc 'Smash': Karen or Ivy    who's playing Marilyn Monroe?“Bombshell” hits the stage with a new leading lady Monday (May 14) on NBC’s Season 1 finale of “Smash,” but is it Karen (Katharine McPhee) or Ivy (Megan Hilty)?

A strong argument can be made for either of these talented ladies to play the blonde bombshell. Ivy has more stage experience and definitely bears a marked resemblance to Marilyn, but Karen has an innocence and naivety — not to mention an amazing voice — that offers a truly authentic performance.

On one hand, Ivy’s already proven she can play Marilyn. She rocked the performance during the workshop — although, the potential funders may not entirely agree. But Karen hasn’t really been given the opportunity to prove herself as Marilyn yet. Plus, hasn’t Ivy essentially already squandered away her chance to play Marilyn, along with her spot in “Heaven on Earth”? But since she and Derek (Jack Davenport) have a history together — a history that may still be in the present since Rebecca Duvall (Uma Thurman) is out of the picture — perhaps she has an automatic in.

The Season 1 finale of “Smash” airs Monday at 10 p.m. on NBC.

Posted by:Jennifer Harper