To help celebrate the one year anniversary of 'Teenage Dream', Katy wanted to give you an exclusive look behind the party of the year! Hear from all the guest stars of the Last Friday Night (T.G.I.F.) video including Kathy Beth Terry, Rebecca Blac, Darren Criss, Kevin McHale, Hanson, Debbie Gibson, Corey Feldman, (Uncle) Kenny G and Richie Nuzzolese as The Jock. Buy 'Teenage Dream' here on iTunes: http:goo.glg9Yba Music video by Katy Perry performing Making Of Last Friday Night. (P) (C) 2011 Capitol Records, LLC. All rights reserved. Unauthorized reproduction is a violation of applicable laws. Manufactured by Capitol Records, LLC, 1750 North Vine Street, Hollywood, CA 90028.