 " It 's About Time ! " featured two different musical numbers , entitled " My Nemesis " and " When We Didn 't Get Along . " During the storyboard stage , a note was simply made indicating that a song would be placed at a certain point in a sequence . As with most songs in the series , they were each written by series co @-@ founders Povenmire and Jeff " Swampy " Marsh over the course of approximately one hour . Povenmire and Marsh proceeded by singing their draft of the song into the answering machine of the series ' composer , Danny Jacob , that Friday night . Jacob performed both of the songs . 
