In the episode, 'The Glee Project' winner Damian McGinty makes his first appearance as an exchange student, Blaine (Darren Criss) sings Katy Perry again and Mercedes and Santana cover Christina Aguilera's 'Candyman.' Plus, it looks like Quinn is still scheming to get Beth back.
Check out some episode stills, the songs and a preview video below.
Here's Fox's official episode description:
"A new foreign exchange student, Rory Flanagan (guest star Damian McGinty, winner of 'The Glee Project'), enrolls at McKinley and crashes with Brittany S. Pierce (Heather Morris) who thinks he's a leprechaun. Meanwhile, Mercedes (Amber Riley) attempts to recruit new members to join Shelby Corcoran's (guest star Idina Menzel) newly formed glee club, and Sue's (Jane Lynch) congressional campaign heats up."
Tell us what you think of the new songs below!