"Old Me" is a song by Australian pop rock band 5 Seconds of Summer, released on 21 February 2020 originally as the first promotional single from the band's fourth studio album Calm, before being released to radio on 6 March 2020 as the album's fourth single.

[4] The song was written by Luke Hemmings, Ashton Irwin, Alexandra Tamposi, Andrew Wotman, William Walsh, Louis Bell, Brian Lee and Andre Proctor.

In a statement, Hemmings said "'Old Me' carries a youthful spirit and follows the narrative of a young person's life growing up, for better or for worse.

We were thrown into the public eye at a young age and gratefully had each other at a confusing time.

The song begins with an underlying organ before a "plethora of percussion pumps up the beat to transform the track into a high-energy dance anthem".