Popsugar Fashion Fashion Instagrams The Best Celebrity Style | September 2021 Here's the Proof That September Was Actually the Most Stylish Month September 30, 2021 by Hannah Weil McKinley View On One Page Photo 35 of 36 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by lexi underwood (@officiallexiunderwood) Share This Link Copy ← Use Arrow Keys → 35 Lexi Underwood Lexi Underwood shared this snap as she celebrated her 18th birthday, and a backless sweater dress shot to the top of our wish list. Previous Next Start Slideshow Fashion InstagramsLooks Of The Week