The genius behind this video is undoubtedly the Rebecca Black cameo. Such a smart marketing move. Both Katy Perry and Black deserve major kudos, Perry for making it happen, and Black because of the way that media and the public treated her during the Fri-pocalypse. The clip also features Glee’s Kevin McHale, Darren Criss, Friday 13th and The Goonies star Corey Feldman and Debbie Gibson, and and an uncredited actor playing the jock Steve Johnson. Full video under the cut.

UPDATED: Anonymous babe is actually Richie Nuzzolese. Gratuitous image below.