08/15/2014 05:11 pm ET | Updated Aug 15, 2014

Aubrey Plaza Shares The Story Behind Her Katy Perry & Hillary Clinton Photobomb

She photobombed some famous girls, and she liked it.

Earlier this year, Aubrey Plaza pulled of an A+ photobomb on both Katy Perry and Hillary Clinton that took the Internet by storm.

(Plaza is the one in the middle doing the Grumpy Cat impression.)

This week, Conan O'Brien finally got her to come clean on the whole thing. And as it turns out, she did it just because she wanted to be BFFs with a certain "California Gurl."

"Conan" airs weeknights at 11:00 p.m. ET on TBS.


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