Rachel and Cassandra are ready to face off in showdown in the next episode of 'Glee,' and now fans can watch how it all goes down.

Two new clips from the 'Swan Song' episode have surfaced, one of which shows the NYADA student and her dance teacher performing 'All That Jazz' from 'Chicago.' Cassandra brings it in the dance department, but Rachel's vocal chops prove that she's a force, too.

In another clip from the show, Rachel and Kurt talk about what an honor it is to be a part of the Winter Showcase, and we see Rachel receiving the coveted invitation from Carmen Tibideaux. Whether it's a daydream or a dream come true remains to be seen.

A third clip (yes, Gleeks, three clips!) Sue and Finn get into it when the Cheerios coach takes over the choir room for her use, but the main action is in the dance room when Rachel and Cassandra go head-to-head.

In addition to 'All That Jazz,' fans will get to hear covers of Crowded House's 'Don't Dream It's Over,' Carson and Gaile's 'Something Stupid and 'Being Alive' from the musical 'Company.' The 'Swan Song' episode of 'Glee' will air on Thursday, Dec. 6 at 9PM on FOX.