It's easy to mix up Katy Perry and Zooey Deschanel. Both are pretty whimsical (Katy with the candy, Zooey with the ukeleles). Both have big anime eyes, dark fringe bangs. Both happen to be superstars of stage and screen. So if you've been continually confused, you're not alone. David Letterman asked Zooey if she minded being compared to her twin Katy on a regular basis, and apparently, it's been going on for ages:

And this was before bangs were chic! So guess who  Zooey Deschanel and Katy Perry also happen to look like?

And yes, probably you. (We mean, there's a good enough chance. Grab a mirror. Report back.)