Britney Spears returned to conservatorship court this week. Vox’s Constance Grady explains how Spears has rapidly become the face of a legal reform movement.Transcript at vox.com/todayexplained.Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts. Learn more about your ad choices. Visit podcastchoices.com/adchoices