updated 08/09/2014 AT 4:00 PM ET
•originally published 08/09/2014 AT 5:15 PM ET
The pop star broke out her glasses (plus a shiny new set of braces) in a promotional video for her upcoming appearance on The Tonight Show, adding a new “adorkable” character, Natalie, fit for Jimmy Fallon’s “Ew!” segment.
The schtick involves Fallon dressing in drag as the lisping, shrieking, Harry Styles-loving teen Sara who – you guessed it – gets grossed out by everything from too sweet Frappuccinos to her lame stepdad Gary.
Watch a sneak peek of Swift in action as Natalie below, and tune in to The Tonight Show on Wednesday at 11:35 p.m.