Three times may be the charm for Britney Spears and "How I Met Your Mother."

With Spears making her second guest appearance on the abruptly popular CBS comedy, the show's co-creator, Craig Thomas, tells THR.com that Monday's episode was written to leave the door open for the pop singer to make a return appearance next season.

Interesting sense of style
Ten million dollar smile
Think I can handle that
Animal in the sack
His eyes see right to my soul
I surrender self-control
Catch me looking again
Falling right into my bed..

Britney Spears reprising her role as Abby, a receptionist at a dermatologist’s office, on the hit CBS comedy How I Met Your Mother.

When Barney (Neil Patrick Harris) and Abby (Britney Spears) realize that they have one thing in common — their mutual hatred of Ted (Josh Radnor) — the “couple” decides to go to the bar to flaunt their new relationship in Ted’s face. Ouch!

Jamie Lynn Spears' baby shower -- which included Britney, Mama Lynne and about 30 other family member and friends -- was also a time for healing. Break out your trust quilts!

Surrounded by pink and blue balloons and with big sister Britney Spears by her side, teen mom-to-be Jamie Lynn Spears celebrated her baby shower in Kentwood, La, on Saturday. The 17-year-old is expecting a girl sometime this summer.

Friends and family gathered at mom Lynne's home known as "Serenity," where Britney and her father, Jamie, are staying. E! News has learned that mom and dad did all the cooking for the alcohol-free affair, which included fried chicken and chili.

Britney Spears is the female artist who has sold more albums in the United States over the last decade (1998-2008). Thanks to Billboard, who was in charge of publishing this list, we know that the Pop Princess has sold 41,800,000 copies in total. This makes Britney #2 overall, below the rapper Eminem and above Queen of Pop (?) Madonna.

Here is the top 10:

#01 Eminem 46,900,000
#02 Britney Spears 41,800,000
#03 Madonna 40,000,000
#04 Norah Jones 36,900,000
#05 Avril Lavigne 30,000,000
#06 P!nk 29,500,000
#07 Nickelback 25,500,000
#08 Alicia Keys 24,300,000

Ezekiel: Honestly, I know me personally, I’ve wanted to work with Britney Spears forever to be honest. So honestly, I don’t think for any of us it was hard.

I think we all wanted to work with Britney and we were motivated to give her something that was great that was going to help her project become a great project to come back with.

From blonde to black to bald, Britney Spears' hair has seen it all. And today the pop idol's hairstylist, Kim Vo, revealed to OK! that he has just given the superstar a whole new look.

Kim, who will also be a judge on the next season of the Bravo reality show Shear Genius, has been the one responsible for Britney's hair for quite some time — he even did her coif for her famous guest-starring gig on How I Met Your Mother. And with Brit-Brit confirmed to make another appearance as Abby the receptionist, he's revamped her look once more.