Billy Ray Cyrus marked his ex-wife's Tish Cyrus' 59th birthday with a sweet serenade. The "Achy Breaky Heart" singer surprised his fans when he dedicated his 2007 song "Ready, Set, Don't Go" to "Hannah Montana Nation" as well as Tish, whose birthday was May 13, and his late mom, Ruth "Ruthie" Casto, who died in 2022 and whose birthday would have been May 14. View this post on Instagram "TRUE STORY," Billy Ray captioned the video of his short home performance on X. "Dedicate this to Hannah Montana Nation and all our friends at Disney. 'Got stars ⭐️ in her eyes, the prize is hers to win.