<Tr> <Td> 16 </Td> <Td> Patriots at Ravens </Td> <Td> Bears at Eagles </Td> <Td> </Td> </Tr> <Tr> <Td> 17 </Td> <Td> no game scheduled </Td> <Td> Eagles at Cowboys </Td> <Td> </Td> </Tr> <P> When the 2014 NFL schedule was released on April 23, it placed a Sunday night game (Green Bay Packers at New Orleans Saints) against a World Series game for the fifth straight year . Starting with this season, NBC was permitted to begin flexing games as soon as Week 5, with the restriction that no more than two games may be flexed between Weeks 5 and 10 . The final Sunday night of the season--December 28, 2014--likewise was a flex game; the slot was left vacant when the schedule was released, as 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 . </P> <P> 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 matchup, citing that the Cowboys are one of the most popular NFL teams playing in the country's largest media market . </P>

Who sings the intro to sunday night football