In the four years between Back to Basics and her brand-spanking latest effort, Bionic, Christina Aguilera has not only time-traveled several decades, but also taken quite a stylistic detour, from vintage soul and jazz to neo-futuristic electro-pop. Now, we could interpret this move a few different ways, not the least of which has a whole lot to do with the emergence (and eventual world domination) of Lady Gaga (herself often compared to Aguilera) and Aguilera’s desire to remain culturally and commercially viable after her maternity leave. In many ways, however, Christina’s cyborging of herself is very much in keeping with her career trajectory. This is an artist who (not unlike another blonde pop diva she’s often compared to) has made a career of creative quick-changes, strapping on new looks, sounds and artistic styles like they were hair extensions. Not all of them fit — heck, some of them come off as downright silly (Xtina, anyone?). But flop or perfect fit, all of Aguilera’s personas share at least a few characteristics: they are fun to watch. They are hot (Xtina, anyone?). And honey, they can sing. Take a walk down memory lane with us as we review the many faces of Christina Aguilera.

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