6 pages | PDF | 1.6 MB'Who Knows' by Avril Lavigne is a heartfelt and emotive pop-rock ballad. The song was composed by Avril Lavigne and Chantal Kreviazuk and set in the key of G major and E minor. The track creates a bright and uplifting atmosphere with its mellow guitar and atmospheric synths. The lyrics talk of the uncertainty of love and the 'what ifs' of life. The song features 53 measures and has a catchy chorus that will stay in your head for days.