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Mapes, Jillian (June 17, 2011). "Beyonce, '1+1'". Billboard. New York: Prometheus Global Media. Archived from the original on June 22, 2014. Retrieved July 1, 2011.
Ramirez, Erika (June 28, 2011). "Beyonce's '4:' Track-by-Track Review". Billboard. New York: Prometheus Global Media. Archived from the original on February 21, 2013. Retrieved February 28, 2012.
"Miss Murphy – 1+1". Australian-charts.com. Hung Medien. Archived from the original on September 23, 2013. Retrieved May 27, 2013.. The Voice contestant Brian Bautista covered the song on the May 9, 2016 show.