"Glee" season 5 stars including Naya Rivera, Lea Michele and Chris Colfer dressed up for Halloween recently. Some of the FOX show actors and actresses' even attended Matthew Morrison's party in very fun, sexy costumes. 

According to E! Online, Michele wore a German milkmaid costume to Kate Hudson's annual party in Beverly Hills on Saturday. She had on a red skirt and low-cut white blouse. For her photo, click HERE.

Hollywood Life reported that Rivera wore a very sexy costume to celebrate the the spook-tacular day. 

Big Sean's fiance went all out in a Carmen Sandiego costume. But she "struck a perfect balance between sexy and festive in the skimpy leather get-up that showed off plenty of leg," reported HL's Andrew Gruttadaro.  

Melissa Benoist, Blake Jenner and Demi Lovato's co-star also attended Hudson's party, and tweeted about the outfit, according to JustJared.

"She's sexy AND educational!," tweeted Naya. "Just doing my part to teach the kids geography #ms.sandiego."

In the wake of the Cory Monteith tribute episode, Adam Lambert went as genie to the 2013 Fred and Jason's Halloweenie holiday concert by the Gay Men's Chorus at the Los Angeles Theatre. His face was painted blue.

Lambert also donned a dark goth costume for the scary festivities, reported JJ. 

[For Rivera and Lambert's photos, click HERE.]

According to JJ, Colfer hit up Morrison's annual soiree at Warwick in Hollywood on Saturday.

The actor was dressed in what appeared as an outer-space costume. He was joined by co-stars, Chord Overstreet, Samuel Larsen and Grant Gustin.  

[For the Colfer's photos, click HERE.]

Like the "Glee" cast's Halloween fashion choices? Tell us in a note below!