Jett is a sports fan and has remained actively involved in the sports world. "Bad Reputation" was used by Ultimate Fighting Championship's Women's Bantamweight Champion Ronda Rousey as her walkout song at the pay-per-view event UFC 157 and is her current theme music in WWE. In April 2019, Jett performed "Bad Reputation" at WWE's WrestleMania 35 as Rousey was introduced. Her cover of "Love Is All Around" (the theme song of "The Mary Tyler Moore Show") was used by the NCAA to promote the Women's Final Four, as well as the song "Unfinished Business", which was never commercially released. "Love Is All Around" went into radio play and became the number one requested song without an existing (support) CD. Jett supplied theme songs for the ESPN X Games premiere and has contributed music to all their games since. At Cal Ripken Jr.'s request she sang the U.S. national anthem at the Baltimore Orioles game in which he tied Lou Gehrig's record for consecutive games played. She also sang the national anthem at the final game played at Memorial Stadium. From 2006 to 2015, the melody for her song "I Hate Myself for Loving You" was used as the theme music for "NBC Sunday Night Football" with re-worked lyrics and retitled "Waiting All Day for Sunday Night". Beginning with the 2019 season, Jett performs the song with Carrie Underwood in the opener of Sunday Night Football games.