Carrie Underwood and Peyton Manning will appear on NBC's Saturday Night Live on March 24. Underwood will perform several hits from Some Hearts. Manning will serve as host. Underwood is only the fifth country artist to perform on the show in the last 20 years, joining Garth Brooks, Faith Hill, the Dixie Chicks and Keith Urban. Underwood is currently recording her follow-up album to be released later this year.