Britney Spears

Britney Spears’ upcoming appearance on the CBS show “How I Met Your Mother” could be - to borrow scene-stealer Barney’s favorite word - legendary.

Spears will guest star in a March 24 episode of the cult series, CBS spokeswoman Kelli Raftery told The Associated Press on Tuesday. The pop star will portray a receptionist in a dermatologist’s office named Abby who becomes “smitten” with Ted (Josh Radnor), Raftery said.

Executives of TV show “How I Met Your Mother” made crew and security members wear security wristbands while singer Britney Spears filmed her part.

Spears will do a cameo on the show, thesun.co.uk reports.

TV star Neil Patrick Harris said: “They wouldn’t let me on the stage because I didn’t have the proper wristband. I said to the security people: ‘Lady, I am actually on the show’. We had words and I eventually made it on set.”