On "Glee," Mercedes (Amber Riley), Santana (Rivera) and Brittany (Heather Morris) have left the New Directions to join Shelby Corcoran's (Idina Menzel) all-girl glee club, the Trouble Tones. On "Mash-Off" the Trouble Tones go head-to-head with the New Directions.
The Trouble Tones performed a mashup of Adele's "Rumor Has It" and "Someone Like You," while the New Directions performed the Hall & Oates songs "I Can't Go For That (No Can Do)" and "You Make My Dreams Come True."
Here's how Fox described "Mash-Off": "Sue (Jane Lynch) starts a smear campaign to take down her biggest competitor for the Congressional seat. Meanwhile, Puck (Mark Salling) has a crush, and Will (Matthew Morrison) and Shelby Corcoran (Menzel) encourage some friendly competition."
"Glee" airs Tuesday nights on Fox at 8 PM ET.
To watch the behind-the-scenes action on "Glee," look below:
