Taylor Swift gets in the picture of a fans Christmas shoot

NASHVILLE, Tenn. -- Taylor Swift is known for doing some pretty awesome things for her fans, and the latest happened at a Nashville park.

The pop star jumped in for an impromptu photo shoot with a couple of young fans. The girls were posing for a family Christmas card photo when swift walked by.

Swift was out for a jog, when the next thing you know, she was striking a pose with the girls.

Neither girl, nor their photographers can "shake it off." It's a day they won't soon forget.