Britney Spears has returned to social media after a brief hiatus. The musician shared a cryptic post about protecting her peace, which came after her ex-husband, Kevin Federline, accused her of bad parenting in his memoir. Before deactivating her account, the singer responded to her former partner’s claims and called them disgusting. FILE – Britney Spears, right, and her husband Kevin Federline arrive for a post Grammy party in Beverly Hills, Calif., on Feb. 8, 2006. (AP Photo/Danny Moloshok, File)(AP) Britney Spears returns to Instagram In the post dropped by Spears on her Instagram, the singer wrote, “So much has happened this year, it’s crazy …” She went on to add, “Get your ballerina [slippers], circle, and own your boundaries. It’s incredibly strict and somewhat of a form of prayer, but with so many endless possibilities in life, it’s important to do you and keep it simple.” Britney Spears’ difficult stay in rehab Ahead of deactivating her social media account, Spears reflected on her difficult stay in rehab at the end of her 13-year conservatorship. …