Actress Alyson Hannigan from the CBS comedy "How I Met Your Mother" attends the March of Dimes Celebration of Babies in Beverly Hills, Calif., on Friday, Dec. 7, 2012 (John Shearer/Invision/AP)

Photo by: John Shearer

Actress Alyson Hannigan from the CBS comedy "How I Met Your Mother" attends the March of Dimes Celebration of Babies in Beverly Hills, Calif., on Friday, Dec. 7, 2012 (John Shearer/Invision/AP)