She has a very polished look when she is on stage, so you might expect Katherine Jenkins to go for something sexy when it comes to Christmas fancy dress.
However, she told the London Evening Standard this is not the case and she actually loves goofing around in something that will make her family and three-year-old godson laugh.
The soprano revealed a reindeer costume would be her ideal outfit for a festive party.
"I always try to be funny rather than sexy with my fancy dress," Jenkins commented.
She also said she likes traditional carols, with In the Bleak Midwinter a particular favourite.
Meanwhile, when it comes to Christmas dinner, she is a veggie so steers clear of the usual turkey, but is a big fan of stuffing, roast potatoes and sprouts.
Jenkins is off to Afghanistan soon to sing for the troops in her role of Forces' Sweetheart - bet they were expecting a saucy Santa rather than a reindeer!