In the program's most hotly anticipated pronouncement since comedian Elayne Boosler's historic school-voucher address, country-music artist Billy Ray Cyrus will speak out on the issue of single-payer health care Thursday on Politically Incorrect With Bill Maher. Inside sources say Cyrus, best known for his 1992 hit 'Achy Breaky Heart,' will argue that a single-payer system places health care in its rightful context as a right of all Americans rather than a privilege doled out on the basis of ability to pay. The hunky, denim-clad Cyrus, who for years had remained silent on single-payer health care, is also expected to finally reveal his much-conjectured stance on campaign-finance reform. 