Popsugar Beauty Beauty News Christina Aguilera Brown Hair December 2018 Christina Aguilera Is Earning Her "Bad Reputation" With This Dark Joan Jett Look 19 December 2018 by Sarah Siegel View On One Page Photo 2 of 2 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Christina Aguilera (@xtina) on Dec 18, 2018 at 10:42pm PST Share This Link Copy ← Use Arrow Keys → 2 Previous Next Start Slideshow Beauty NewsHair ColourCelebrity HairChristina Aguilera