6 pages | PDF | 1.4 MB"1-2-3" is a song from the American musical television series High School Musical: The Musical: The Series. It was composed by Jason Mater, Jordan Powers and Bekah Novi, and performed by Julia Lester, Dara Reneé and Sofia Wiley. The song is upbeat and hopeful, about the joys and struggles of high school life. It is set in the key of A♭ major and F minor, with a total length of sixty-six measures. The lyrics and instrumentation convey a sense of excitement, adventure, and unity as the characters embark on their high school journey.