You might think you know Rachel Platten, the singer-songwriter behind the inspirational, never-give-up hit “ Fight Song. ” Since debuting a decade ago, the catchy, upbeat tune has been a motivational anthem for everyone, from cancer patients to presidential hopefuls. But “Fight Song” revealed just one facet of Platten’s multidimensional personality—the “really encouraging, empowered side,” she says. Her latest album, I Am Rachel Platten , invites listeners to get to know her on an even deeper, more personal level, including her struggles with “rage, jealousy, fear, grief and all the things that the human existence entails,” she says. “I really feel like it’s my proper introduction to the world,” she adds. “This record was the first time that I really vulnerably shared these [other] parts of me…. It’s like I didn’t own the shadow side of me because I was too afraid to be anything but grateful and cheerful and empowered and excited. And I thought that’s who I was supposed to be becaus...