NEW YORK:- Metal legend Ozzy Osbourne announced what he said will be his final tour, months after his original band Black Sabbath called it quits. Osbourne - who has maintained an avid following for five decades with sensational and often sinister live shows - will open the tour on May 5 in Mexico at a venue to be determined. The “Prince of Darkness” will then tour Chile, Argentina and Brazil before a month of European dates opening on June 1 in Moscow. The 68-year-old English singer turned Los Angeles resident said he will close out the tour in North America, with dates to be announced later. “People keep asking me when I’m retiring,” Osbourne said in a statement.