Published Friday, 14 December 2012
Wearing Christmas antlers on her head, the tipsy star was on her way home from a radio station Christmas party when she broke into song with her sibling accompanying her on guitar.
After ripping through her breakthrough single Kids in America, Kim and Ricky then offered up a sample of Rocking Around The Christmas Tree, the festive charity single she recorded with comedian Mel Smith.
As some grumpy commuters attempted to ignore the chart-topper, Wilde addressed one fan who was capturing the magical moment on her cellphone camera.
She said: "We're all ignoring each other like we normally do. We're just looking down into our phones and stuff, but hey, it's a Christmas thing, so join in with us."
The happy singer then wrapped up her festive ditty and wished everyone a happy Christmas.