Singles

Non-album songs

"Nobody Wants to Be Lonely" (with Ricky Martin, 2001)

"Lady Marmalade" (with Lil' Kim, Mýa and Pink, 2001)

"Car Wash" (featuring Missy Elliott, 2004)

"Tilt Ya Head Back" (with Nelly, 2004)

"We Remain" (from The Hunger Games: Catching Fire, 2013)

"Say Something" (with A Great Big World, 2013)

"Change" (2016)

"Telepathy" (featuring Nile Rodgers, 2016)

As Featured Artist

File:What's Going On.jpg "What's Going On" (with Artists Against AIDS Worldwide, 2001)

File:El Ultimo Adios.jpg "El Ultimo Adios (The Last Goodbye)" ( (with various artists), 2001)

File:Somos Novios.jpg "Somos Novios (It's Impossible)" (Andrea Bocelli featuring Christina Aguilera, 2006)

File:Tell Me.jpg "Tell Me" (Diddy featuring Christina Aguilera, 2006)

File:Moves like Jagger.jpg "Moves like Jagger" (Maroon 5 featuring Christina Aguilera, 2011)

File:Feel This Moment.jpg "Feel This Moment" (Pitbull featuring Christina Aguilera, 2013)

File:Do What U Want.jpg "Do What U Want" (Lady Gaga featuring Christina Aguilera, 2014)