The Kansas City Chiefs' Christmas Day home finale against the Denver Broncos will feature a halftime show by the Kansas City Symphony and a national anthem performance by actor-musician Brianna Yancey and "The Voice" contestant Mikaela Ayira. The Chiefs, with a 6-9 record, are out of playoff contention. The Broncos, at 12-3, are on a strong winning streak and aim to secure the AFC West title and top conference seed with a victory.