Finally, the best doppelganger duo in Hollywood. It has to be Katy Perry and Zoey Deschanel. The internet went haywire upon discovering the striking similarity between these two celebrities. It’s not an overstatement to say that they truly look undifferentiated. They look like long lost twins separated at birth. Interestingly, they both started their career at the same time. Zooey is also a singer and an actor, and she recently shared how it can be annoying at times to be always mistaken for somebody else.