game; the slot was left vacant when the schedule was released, as had been the practice of the past six seasons. The game's teams (and, by extension, its location) was announced after most week 16 games it was filled by the Cincinnati Bengals and Pittsburgh Steelers. Country/pop superstar Carrie Underwood continued her role as the performer of the Sunday Night Football opener. On November 11, 2014, the NFL announced that the November 23 game between the Dallas Cowboys and New York Giants game would air as scheduled, even though the Detroit Lions–New England Patriots game was considered to be a better match-up, citing that the Cowboys are one of the most popular NFL teams playing in the country's largest media market. For the first time since flexed scheduling went into effect, no Sunday night games were flexed during the season other than Week 17 (where the match-up is usually determined as late as six days prior to the Sunday of Week 17). On December 21, 2014, the NFL announced that the rivalry game between the Pittsburgh Steelers and Cincinnati Bengals would be flexed into the Week 17 Sunday Night Football slot, with the winner clinching the AFC North. The league considered flexing the Atlanta Falcons–Carolina Panthers game into the Sunday night slot as it decided the NFC South while the loser was eliminated, but the division being historically weak (it was assured to have a division winner with a losing record by the end of Week 16), combined with the Steelers being a major draw, led to the league's decision. With the Steelers and Bengals clinching a playoff spot in Week 16, it also marked the first time since the NFL scheduled all-intradivisional match-ups in Week 17 in 2010 that a game flexed to the Week 17 slot featured at least one team (in this case both) that was already in the playoffs. It was later reported by Sports Illustrated columnist Peter King that the league chose to flex the Steelers-Bengals game because CBS has not had a game flexed in the Week 17 slot since 2009; the aforementioned Falcons-Panthers match-up was later flexed to CBS as part of the new television contract that allows intraconference match-ups to be flexed between CBS and Fox. 2015 The 2015 schedule was released on April 21, 2015. The defending Super Bowl champions the New England Patriots faced the Pittsburgh Steelers during the NFL