S2, E7: ABED FINDS HIS INNER “MEAN GIRL” WHILE JEFF AND TROY STUMBLE UPON A SECRET GARDEN-- HILARY DUFF GUEST STARS-- After a classroom smackdown with a group of “mean girls” led by Meghan (guest star Hilary Duff), Britta (Gillian Jacobs), Shirley (Yvette Nicole Brown), and Annie (Alison Brie) bond with Abed (Danny Pudi) by turning him into the ultimate "mean girl." Meanwhile, Jeff (Joel McHale) and Troy (Donald Glover) embrace a zen-like spirituality under the guidance of a groundskeeper when they come across a secret trampoline on campus. Determined to uncover the source of their new bliss, Pierce (Chevy Chase) ends up taking a disastrous turn on the trampoline and lands in the hospital. Ken Jeong also stars.