Some of the biggest household names in the last century have been singers - think Whitney Houston, Michael Jackson, and Prince. These artists have graced us with iconic lyrics, melodies, and of course, heavenly and powerful voices. Do we really remember how they looked during their careers, though? Now more than ever before it's easy to see the artists behind the voices blasting through our speakers, and therefore easier to track their changes during their time in the limelight, from young to old. Seriously, though, it can be truly jarring to see famous musicians as young, eager beginners - especially if they've aged a lot since then.