THREE DAYS GRACE ANNOUNCES HIGHLY ANTICIPATED SERBIA CONCERT WITH SPECIAL guest BADFLOWERRock Titans Set to Storm Belgrade with Explosive ShowFollowing their monumental reunion with original vocalist Adam Gontier and the announcement of their U.S. tour, Three Days Grace is bringing their electrifying live show back to Europe this fall. The multi-platinum rock icons have confirmed massive headline dates — including Exclusive show on November 29th in Belgrade, Serbia, at Hangar  — with...