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Lemme See: An Usher Career Timeline in Pictures

It's been 15 years now that Usher's consistently ranked as one of our country's biggest and best pop stars, a career that's taken him from R&B to crunk to house, from Jermaine Dupri to The Neptunes to David Guetta, from perpetual toplessness to...sporadic shirt-wearing. Take a look at some of the images that have defined Ush over the course of those 15 years, and soak in the many highs of one of the best music careers of this generation.