Idina Menzel returns to Glee on "I Am Unicorn," which airs tomorrow night and whose official trailer you can view HERE.

We've already enjoyed one early listen from the episode, as Chris Colfer will belt out a version of "I'm the Greatest Star." Now, Fox has released another sneak peek at the installment, this one featured Lea Michele and Idina Menzel teaming up on the Broadway classic "Somewhere."

Look for Michele's Rachel to try out for the school play during the hour and check out this impressive rendition below:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.