Watch Taylor Swift & Calvin Harris Cozy Up on Santa's Lap

Taylor Swift and DJ Calvin Harris attend the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (photo: Jeff Kravitz/BMA2015/FilmMagic)

Every day’s a holiday when you’re in Taylor Swift’s inner circle, but if that day also happens to be the star’s 26th birthday AND 12 days before Christmas – fuggedaboutit!