You probably know The Pierces best from their appearance on Gossip Girl (they played at a debutante ball, natch) or as the voices behind the Pretty Little Liars theme song, right? Well, it's time to really get to know them because their new EP Believe In Me (out March 31) is super-catchy. We caught up with the Alabama-born sisters, Allison (brunette) and Catherine (blonde), to ask them to snap what they've been up to on their iPhones. Here's a glimpse into their lives...