That '70s Show - Season 6 Episode 4 The Acid Queen

No one in the gang believes Kelso's claim that he hooked up with Brooke, a beautiful and conservative older girl, at a Molly Hatchet concert. Much to Kelso's shock, Brooke denies knowing him and rejects all of his advances. Brooke's presence also disrupts Jackie and Hyde's relationship when Jackie asks for his opinion about Brooke's looks. Also, Fez decides to pursue college-bound virgins while Eric learns of an interesting collection kept at the local library.