Finding her voice! Britney Spears is set to address the court directly at an upcoming conservatorship hearing. The pop star, 39, has rarely spoken about her long-standing legal battle to have dad Jamie Spears removed from her conservatorship, but on June 23, she’ll finally get the chance to share her side of the story. “Britney’s stayed silent for long enough,” an insider tells Life & Style. “It’s her life, and she’s ready to take back control.” Things came to a head in late March when Britney’s father, 68, requested that the singer’s estate pay more than $3 million in legal fees for his high-powered team of attorneys Mom Lynne Spears “vehemently objected” to the filing, claiming the law firm’s services, including the $224,000 used for press communication, were not “performed…