She even gets the crazed teen mannerisms down pat, burying her head in Taran Killam's shoulder, giving the camera a wide-eyed glance, destroying some Christmas presents and screaming her heart out by the window, the Rockefeller Christmas tree looming outside.

If she's all in a tizzy about the boy band's musical guest appearance on the show, imagine how Twitter will be Saturday night. Adams and One Direction's episode will air Dec. 20, the final SNL of 2014. Given the show's penchant for having the musical guests make cameos in sketches--most prominently Nicki Minaj's multiple appearances two weeks ago--don't be surprised if the boys show up on more than just the stage, too.