21 of the Best 'How I Met Your Mother' Guest Stars
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Britney Spears
The Princess of Pop brought her star power to How I Met Your Mother for two episodes in 2008. She appeared as Abby, a receptionist at dermatologist Stella’s office with a soft spot for Ted.
Image Credit: Monty Brinton/CBS
August 4 2016 — 1:15 PM EDT
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