Trainor announced the song at the 2016 KIIS-FM Jingle Ball, saying "It's an upbeat, 'love yourself' woman anthem. It goes like...'Cause I'm a lady...and then the BEAT DROPS!' It's pretty fire." Prior to "I'm a Lady"'s release, Trainor teased the song and the music video on her social media accounts. She announced the release date on February 21, 2017.