Mike O'Malley, Chris Colfer Photo

From: Photo Flash: Last Night on GLEE's 'Sexy' Episode

When free-spirited substitute teacher Holly Holliday (guest star Paltrow) fills in for the absent sex-education teacher, she joins forces with Mr. Schuester to teach the kids of New Directions the facts of life.Meanwhile, Emma heads up the Celibacy Club, and she and Dr. Carl (guest star Stamos) address some issues in their personal life in the all-new 'Sexy' episode of GLEE. Check out photos from last night's episode below!