You can argue about who's been most successful or who has the most stage presence, but when it come to sheer vocal ability Christina has her peers beat hands down. It's amazing that this voice can come out of such a tiny woman, but vocally she's more than a match for the likes of Aretha, Patti and Whitney.
This Greatest Hits album not only shows off her power but also her versatility - from her pop beginnings she's moved on and tried her hand at jazz, blues, rock, RnB and everything in between. Even her teen pop is catchier and has more bite than your average commercial throwaways, but in songs like Fighter and Beautiful she shows off true soul and grit as an artist. The new stuff that's included is very electro pop, very 'now' and just as good as any of her back catalogue, with her showing off a slightly more pared down vocal than her usual high riffs. The one and only low point on the album is the strange remake of Beautiful, a gorgeous song that frankly did not need messing with - but even that's oddly listenable, and when the worst you can say of this diva is that a song is okay rather than her usual excellent you know she'll be sticking around. That voice will ensure she does so here's to the next ten years.
Personal favourite - Fighter and Candyman. The first for its brilliant Dave Navarro guitar and amazing vocal, the second for its sheer retro fun