Bragging rights in a slumping industry don't deliver much glory. Just ask Warner Music Group's Lyor Cohen. As the head of the company's North American recorded music operations he laid claim in 2007 to the most-improved performance among major record companies. Now he's off to a hot start in 2008 with rapper Flo Rida, whose hit "Low" tops the singles chart this week. Warner's stock, meanwhile, remains stuck in the cellar as overall CD sales sputter. The Post caught up with Cohen in his office last week for a rare interview to discuss the state of the music business. (NY Post)