Billy Ray Cyrus and estranged wife Firerose have finalized their divorce, RadarOnline.com can reveal. The Achy Breaky Heart hitmaker, 62, and the Australian country singer, 36, filed to legally split in May after just seven months of marriage. Cyrus’ attorney confirmed that the former couple reached a settlement agreement on August 2. Lawyers Rose Palermo and Jason Talley said in a statement: “This past Friday the parties reached a settlement agreement at mediation to dissolve their 7-month marriage, and the Court declared the parties divorced this morning. Mr. Cyrus is relieved to put this ni…