Updated Spoiler! According to SpoilerTV, Rachel (Lea Michele) will duet with Cassandra (Kate Hudson) in season 4 episode 9, "Swan Song".
Rachel (Lea Michele) sure has had her fair share of moments with NYADA dance instructor, Cassandra July (Kate Hudson) - some not as pleasant as others, for sure.
Now, Lea tells us via Twitter that Rachel will soon share a duet with Cassie. Not just any duet either, a Broadway duet.
— Lea Michele (@msleamichele) November 5, 2012
Which of course is what Lea does best. What Broadway number do you think Rachel and Cassandra will tackle this season?
Source: Lea Michele via Twitter