Britney Spears will definitely reprise her role on TV sitcom How I Met Your Mother, after signing a deal to appear in one more episode.

The pop star first appeared on the U.S. show last month, playing a lovesick secretary, and she'll make her return to the small screen in an episode that is set to air in America on 12 May.

The episode is scheduled to begin production on Monday and will feature Spears alongside the sitcom's star Neil Patrick Harris, as their characters continue their on screen love affair.

In a new statement, the show's executive producer and co-creator Craig Thomas says: "We're all so thrilled to have Britney joining us once again."

Spears' initial guest appearance on How I Met Your Mother helped the show earn its highest ratings.

If you missed Britney the first time round, see her appearence here.