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Katy Perry

Perry plays a character so naive that the gang can only remember her as "Honey" — as in a patronizing "Oh, honey." But she's a sweetheart, and she comforts Barney while he's dealing with his mixed emotions over his biological father.

Image Source: CBS
Read More Katy PerryTVJennifer LopezHow I Met Your MotherBuzz Slideshow
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