This August, GL celebrated our 20th anniversary—so, naturally, we threw a huge party! But our second annual Back-to-School Fashion Bash wasn't just our birthday…it was also the official pre-party to Pier 6 Pavilion's Austin Mahone concert featuring Fifth Harmony and The Vamps. So what, exactly, is Fashion Bash? It's GL's annual (and totally free!) music and fashion festival for teens: three hours of fun, fashion, music, makeovers, giveaways, swag bags and more. Oh, and did we mention the celebrity hosts, popstar performers and surprise celeb guests? Basically, it's the #bestdayever for girls who want to rock out, look amazing and have a blast. And—since we're always excited to head back to school and hit the halls in style—we wrapped up this amazing day with a fab fall fashion show featuring all the cutest new looks and trends. Check out more details and pictures at http://www.girlslife.com/fashionbash2014