"Part of Me" was released to most iTunes stores worldwide following Perry's performance at the 54th Annual Grammy Awards on February 13, 2012: "Part of Me – Single by Katy Perry". iTunes (AU).
Truy cập ngày 3 tháng 1 năm 2012.  ^ "Part of Me" was released to most iTunes stores worldwide following Perry's performance at the 54th Grammy Awards on ngày 13 tháng 2 năm 2012: “Part of Me – Single by Katy Perry”. iTunes (AU).