Two days before the Big Game, the NFL has released Carrie Underwood's "Waiting All Day for a Super Bowl Fight," Super Bowl XLIX's official theme song.
Stacked high with synthesizers, power chords and banjo, "Waiting All Day for a Super Bowl Fight" is a reworked version of NBC's Sunday Night Football theme, which Underwood began singing during the 2013 season. Previous Sunday Night Football vocalists include Faith Hill, who logged six years with the show, and Pink, who originated the theme song in 2006. Although the lyrics tend to change with each season, all versions of the theme song are based on Joan Jett and the Blackhearts' 1988 hit, "I Hate Myself for Loving You," much in the same way that ABC's Monday Night Football theme was based on a revised recording of Hank Williams, Jr.'s "All My Rowdy Friends Are Coming Over Tonight," from 1989 to 2011.
Hill made several appearances at the Super Bowl between 2007 and 2012, performing the theme song before kickoff. It's unclear if Underwood will also perform live, although the country singer — who grew up rooting for the Dallas Cowboys — is a self-professed football junkie.