In many ways, Bionic proved to be one of her most divisive albums with rumours emerging of the record label losing their nerve and releasing a version of the album Aguilera had not originally envisaged. Perhaps one of her most ambitious projects was the forward-looking future pop of Bionic, an album which saw her collaborate with the likes of Peaches, M.I.A., UK synth legends Ladytron and Santigold. She’s also been something of a master of reinvention, from Christina the teen pop sensation to working with Redman and Rockwilder and introducing a new dark-haired alter ego in the shape of Xtina. Time magazine once described her “one of the most strikingly gifted singers to come along since Mariah Carey.” And one possessed with one of the biggest voices. With worldwide sales of over 43 million records, over 3 billion YouTube views and five No.1 US singles, it’s safe to say Christina Aguilera has established herself as, over the course of 22 plus years, one of the biggest pop stars in the world.

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