"Top Billboard 200 Albums"(PDF). Billboard. Vol. 121, no. 50. December 19, 2009. p. 168. Archived(PDF) from the original on December 20, 2020. Retrieved May 10, 2021 – via World Radio History.
"A Pop Star in Four Acts"(PDF). Billboard. May 13, 2017. p. 44. Archived(PDF) from the original on March 7, 2021. Retrieved February 14, 2021 – via World Radio History.
"Top Billboard 200 Albums"(PDF). Billboard. Vol. 121, no. 50. December 19, 2009. p. 168. Archived(PDF) from the original on December 20, 2020. Retrieved May 10, 2021 – via World Radio History.
"A Pop Star in Four Acts"(PDF). Billboard. May 13, 2017. p. 44. Archived(PDF) from the original on March 7, 2021. Retrieved February 14, 2021 – via World Radio History.