Christina Aguilera’s 15 Best Collaborations

Christina Aguilera's 40 Best Songs From 'Candyman' to 'Beautiful,' we count down Christina Aguilera's 40 best songs. MORE >> Christina Aguilera is one of the most versatile artists of her generation, so it shouldn’t come as too much of a surprise that she has a knack for collaborations. Whether Legend X is singing the hook on a rap song or experimenting with country, the 40-year-old elevates any...

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