'Mother' Costar On Britney Spears: "She's Beautiful. I Was So Focused On Her Hair That I'm Overwhelmed."

The cast of 'How I Met Your Mother' is falling in love with 'beautiful' Britney Spears. Filming for Brit's episode took place on Wednesday and Thursday in LA. Cast member Jason Segel told Us magazine:

"She’s beautiful. You know, I was so focused on her hair that I’m overwhelmed with adjectives! She was great and lovely."

Alyson Hannigan added, 'she’s just a person, so sweet and funny. We just talked about our clothes and dogs, and it was surprisingly just normal."

The cast denied rumors that Alicia Silverstone turned down a role after learning Britney was on board. The episode will air Monday, March 24.