Britney Spears is returning to How I Met Your Mother, a source tells PEOPLE.

“The show is ecstatic and so is Britney,” a source said. “She had so much fun the first time around she really wanted to come back. It was a mutual decision to work together more.”

The singer/actress will do one episode, the source says. Fox studios would not confirm the appearance.

Spears, 26, appeared on the March 24 episode, playing a receptionist at a dermatologist’s office who fell for one of the show’s main characters, played by Josh Radnor. She received wide accolades for the spot.

“She was hilarious in the table-read, and I got to see her do the run-through as well, and she was great,” cast member Jason Segel said.

http://tvwatch.people.com/2008/04/19/excusive-britney-returning-to-how-i-met-your-mother/

May 12:

CBS PRESS RELEASE

FOR IMMEDIATE RELEASE


BRITNEY SPEARS RETURNS TO "HOW I MET YOUR MOTHER," MONDAY, MAY 12

Production on the Episode Begins Today

LOS ANGELES, April 28 - Singer Britney Spears will return to HOW I MET YOUR MOTHER to guest star in an episode to be broadcast Monday, May 12 (8:30-9:00 PM, ET) on the CBS Television Network. Production on the episode began today.

"We're all so thrilled to have Britney joining us once again. And just to head it off at the pass this time around: Yes, Mom, Britney's very nice and no, I can't get her autograph for you," said Craig Thomas, executive producer and co-creator, HOW I MET YOUR MOTHER.

When Barney and Abby realize that they have one thing in common - their mutual hatred of Ted - the "couple" decides to go to the bar to flaunt their new relationship in Ted's face. Desperate to get a rise out of his former pal, Barney pops a surprising question to Abby.

HOW I MET YOUR MOTHER airs Mondays (8:30-9:00 PM, ET) on the CBS Television Network.

I wonder if Britney can turn out to be a regural next season