Britney Spears has spoken of her happiness at working as a guest star on the US comedy series 'How I Met Your Mother'.

Reuters reports that Spears is playing a dermatologist's secretary called Abby on the show.

In a statement released by the show's makers CBS, Spears said: Working at 'How I Met Your Mother' has been so terrific. Everyone, including the cast, the crew and the producers, has been wonderful and Abby is such a fun girl to play. I'm having a blast!"

The episode guest starring Spears is expected to air on US TV on 24 March.