LeAnn Rimes has no qualms about showing off her toned body during the holidays — check out her latest get up!

From the looks of it, LeAnn Rimes will be on the Naughty List this Christmas! The 28-year-old singer made a guest appearance at at the Gay Men’s Chorus of L.A. concert Dec. 19 and sported a sexy Santa costume that showed off much more than her good cheer.

“Mrs. Clause at your service!” she tweeted. “I just got pinned by the Gay Men’s Chorus Of L.A.! I’m an honorary member now…head Queen!”

LeAnn later tweeted, “Wow, a beautiful night! My heart broke and I almost couldn’t sing as I spoke about the young gay men and women who have taken their lives this year,” she tweeted after the show. “It gets better!”

We bet her queens aren’t the only ones who fawned over Ms. Rimes‘ scandalous costume. Her rumored fiance, Eddie Cibrian, probably couldn’t wait to get her under the mistletoe!