Favorite 'HIMYM' Guest Stars

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As How I Met Your Mother comes to a close, we look back at 15 of our favorite guest stars on the beloved CBS comedy. From Britney Spears to Bryan Cranston, check out the famous faces that have joined the cast over the past nine seasons.

First up, Katy Perry played Honey, Zoey van Smoot's cousin, in season 6, who Barney (Neil Patrick Harris) eventually talks into sleeping with him.