Carrie UnderwoodCarrie Underwood makes her television sitcom debut on CBS' 'How I Met Your Mother' Monday night (March 1) at 8:00 PM (ET), playing 'Tiffany' -- a pharmaceutical sales rep and love interest for Josh Radnor's character 'Ted.'

The country superstar, who has also been shooting scenes for her first feature film 'Soul Surfer,' says her lack of acting roles helped keep expectations low for the cast and crew of 'How I Met Your Mother.' "They knew my limited acting experience, so I don't think anybody was holding out these high expectations for me," says Carrie. "If anything, I think they were pleasantly surprised, so they probably had pretty low expectations of me when I walked in." She loved her time on the set, and says everybody was very nice and "laughing the whole time."

The character Carrie plays is not the nicest girl on the block. "She's kind of mean, I guess," admits Carrie. "I know girls like this, so I think she was kind of easy to play. I didn't have a really difficult character to be playing. But it was a lot of fun ... I got to just hang out with some awesome people and dress up in funny costumes."

The animal lover, who has also teamed with Pedigree to help promote their pet adoption campaign, also got to play with baby pigs during her time on the set. "The baby pigs were literally three days old," explains Carrie. "Some of the other actors weren't so keen on the farm animals ... but I've been around goats and pigs and cows and all that stuff so I didn't have a problem with it. So I was like, 'I'll do all the tough stuff, you just stand there and look pretty."

In between filming, Carrie has been getting ready to launch her Play On tour on March 11 in Reading, Pa.. She's taking along her opening acts Craig Morgan and Sons of Sylvia.

Carrie Underwood on AOL Music