Popsugar Beauty Celebrity Beauty Gwen Stefani's Beauty Evolution A Look Back At All of Gwen Stefani's Beauty Looks October 3, 2014 by Emily Orofino View On One Page Photo 5 of 23 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 1999 In the late '90s, the singer started experimenting with more subtle colors against her platinum base, like these navy-tipped strands. Previous Next Start Slideshow Gwen StefaniCelebrity Beauty