This week on POPSUGAR Girls' Guide, we jumped into Fall with decadent desserts, the season's biggest trends, and more. FleurDeForce gave us the inside scoop on her must-have pieces for updating your Autumn wardrobe, while Allison McNamara showed us how to add sparkle to a plain white tee on Designer DIY. Top That! hosts Tyler Oakley and Becca Frucht investigated Rihanna's latest Instagram debacle, and Just Add Sugar's own Brandi Milloy whipped up a batch of mini peach cobblers. As always, let us know what you think in the comments, and click the subscribe button below for more great videos!