Photos! Glee Star Dianna Agron Celebrates Her Nylon January 2012 Cover

Glee’s good girl-gone-bad (gone back to good, as of this week’s “Hold On to Sixteen” episode) Dianna Agron took some time out from washing the stink out of Quinn’s attitude to celebrate her January 2012 Mad Men-inspired Nylon magazine cover on Wednesday, December 7. The stylish star and party guests had cake and drinks in her honor at an appropriately Old Hollywood-style venue, The Writer's Room in Los Angeles. Click through for more pics of the lovely Dianna at the event.