Britney Spears made her much-hyped guest appearance Monday night's "How I Met Your Mother," submersing her tumultuous personal life and portraying a sweet-natured receptionist, Abby, with a crush on unlucky-in-love Ted (Josh Radnor).

Over 10 million viewers tuned in to watch Britney Spears, who appeared during the episode for only four minutes, but wore eight different sets of clothes.

She played a shy receptionist in dermatologist's office who falls in love with the main character, Ted.

The costumes from the episode were auctioined off for thousands of dollars.

Critics applauded Britney who last made an appearance with a guest role in the hit US sitcom Will & Grace in 2006.

In the New York Post, Linda Stasi wrote: "You'd never know that pop tart Britney Spears had ever had a bad day in her life.

"Now clean and sober and under her dad's thumb once again, Britney looked as adorable last night as she did waaay back when.

"On the show, which she filmed in the last few weeks, Brit looked slim, (OK she was behind a desk), trim and gorgeous." 

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