WATCH: Katy Perry Joins the Gang of 'How I Met Your Mother'

Katy Perry is one gullible girl! The pop star plays the role of Zoey's (Jennifer Morrison) cousin Honey on "How I Met Your Mother" and is a bit clueless. "My apartment building is so safe. My neighbor, he even installed a security camera in the shower," Honey says. Marshall Eriksen (Jason Segel) responds, "Oh honey!" Honey is also caught up in a love triangle between architect Ted Mosby (Josh Radnor) and the suited-up stud Barney Stinson (Neil Patrick Harris). Katy joins a slew of other celebs to guest star on the hit show including Jennifer Lopez and Britney Spears. Catch her "HIMYM" episode airing Monday night, February 7, on CBS.

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