Carrie Underwood's "How I Met Your Mother" Episode Airs Tonight

Carrie Underwood is making her TV acting debut with tonight's episode of CBS' "How I Met Your Mother." Underwood guest stars as Tiffany, a pharmaceutical sales rep and new flame for Josh Radnor's character Ted. Underwood gets to play dress up in the episode as she travels through time in a mind visual relationship lesson shared by Neil Patrick Harris' character Barney. "How I Met Your Mother" airs tonight on CBS at 8:00 pm Eastern. "How I Met Your Mother" is the first of two acting projects for Underwood this year. Last month she was in Hawaii shooting the movie "Soul Surfer," in which she plays the part of church youth leader Sarah Hill. The film is based on the autobiography of 19-year-old surf champion Bethany Hamilton, who has excelled at the sport despite losing her arm six years ago in a shark attack.