There's one undeniable truth about birthday girl Gwen Stefani , who turns 47 on October 3: She wears her heart on her sleeve. The breakups, the frustrations, the wistfulness... it all creeps into her lyrics and pulls listeners in. Whether she's wailing about being underestimated as a woman or mourning a failed marriage, the pop star has a way of getting under our skin. Is it any wonder her latest album is called This Is What the Truth Feels Like?Even if you don't relate to Stefani's current country-crooning, Blake Shelton-loving ways, you can surely still appreciate the familiar sentiments expressed in her work, both with No Doubt and in her solo career. She's been through the heartbreaks and the betrayal. Her confidence has faltered. She's put up with sexism and other b-a-n-a-n-a-s BS. She totally gets us.Read on for a roundup of lyrics that have hit us right in the heart. Keep it coming, Gwen.