<br /> Pop superstar Taylor Swift has attacked Justin Bieber’s manager for buying her music catalog.<br />This prompted Bieber to come to his defense in a heated online spat, reports Reuters.<br />Swift on Sunday wrote a lengthy post on Tumblr voicing dismay that Scooter Braun was acquiring Big Machine.<br />Big Machine is a Nashville-based record company that owns the master recordings of her past songs.<br />A rep for Braun, who owns the company Ithaca Holdings, did not respond to a request for comment. <br />
