Popsugar Fashion Fashion News Youngest and Oldest Fashion Campaign Stars These Fashion Campaigns Prove That Age Is Nothing but a Number April 7, 2015 by Samantha Sutton View On One Page Photo 10 of 37 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 10 Justin Bieber in Calvin Klein Age: 21 Previous Next Start Slideshow Fashion NewsCampaigns