She has been pushed out of the lead, but only on Marilyn. Ivy is still a major player on Smash.
Added:
Does Karen have what it takes to be a big-time star? She books a commercial on the episode "Hell on Earth."
Added:

Smash Season 1 Episode 9 Quotes

I feel like a frog.

Karen

It was something. It was total betrayal of me and Leo and 18 years of marriage. It was betrayal of everything.

Frank

Smash Season 1 Episode 9 Music

  Song Artist
Smash cast cheers Cheers Smash Cast iTunes
Song The Higher You Get, the Farther You Fall Smash Cast