What is the episode 15 of Sonny With a Chance about?

The cast of "So Random!" receives 24 hours notice that their beloved prop house will soon become the meditation room for the "MacKenzie Falls" cast. After reminiscing about past sketches and great memories, the "So Random!" kids decide to put up a fight and win their room back. Source: http://www.tv.com/sonny-with-a-chance/show/75677/episode.html?tag=page_nav;episode