Even though Britney Spears' second guest appearance on How I Met Your Mother has come and gone, it's still the top item on everyone's list of questions for show co-star Alyson Hannigan.

"Was she acting all crazy on the set?" asked Jimmy Kimmel, who was filling in for Regis Philbin on Friday's Live With Regis & Kelly.

"Not at all," said Alyson. "She's very funny... very lovely and polite."

Recounting the pop star's time on the HIMYM set, Alyson recalled, "She really liked my little dog... They bonded. My puppy got to kiss Britney Spears!"

While co-host Kelly Ripa suggested that Hannigan "never wash that puppy again," Jimmy was a little more forward, saying, "I hope Britney doesn't end up pregnant!"

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