Yesterday in London, as anxious fans filled the theater for a special pre-screening of the flick, Katy dropped by to surprise them all with her presence!!!
Check out the vid of Katy's grand entrance and fans' reviews (above)!!
Aw…how fun that must've been!!! We love the looks on all the Katy Kats faces!
Fans in the States can catch Katy Perry: Part Of Me when it hits theaters on July 5.
We can't wait to watch!!!