Lollapalooza, held this past weekend, was pretty major — and we mean major. Think performances from Lorde, Outkast, Iggy Azalea and Eminem (who was joined by his BFF Rihanna, NBD). But that wasn't it. Naturally, there was some unpredictable weather. Our very own ASOS girl Sammy, from the US PR team, was there for the festival fun, and gave us a demonstration on how to keep your look on point — rain or shine.