The great Kevin Federline once guest-starred on CSI. Now it's time for his former spouse to take a turn on one of CBS' hit shows.

CBS has confirmed that Britney Spears will be a guest star on an episode of How I Met Your Mother this spring, playing a secretary.

"I was shocked that Madame Spears was willing to come and do some acting," star Neil Patrick Harris recently told Entertainment Tonight.

"She has not acted in awhile. This is a very interesting role. It is very not like her at all in real life in any of her previous chapters. She plays the secretary to another girl that Ted (Josh Radnor) is after. So, it will be very unlike any Britney we have seen before, and we have seen a lot of Britney recently."

We sure have, Neil. Harris is openly gay, so it's probably not doing much for him, but he's gotta be referring to crotch shots and/or Britney Spears nude pics.

Britney Spears' past acting experience includes the movie Crossroads (1999), and music videos such as "Everytime," where she was quite naked and suicidal. Nice.

Hopefully this role is funny and involves pants. Britney Spears was supposedly on the set of How I Met Your Mother yesterday in L.A., chatting with Radnor.

In other How I Met Your Mother guest star news, the lovely Vanessa Minnillo will also be appearing on the show's March 17 episode!