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Taylor Swift trademarks lyrics such as 'sick beat'

30 January 2015 Last updated at 07:39 GMT

Pop star Taylor Swift has trademarked phrases including "this sick beat" and "we never go out of style", in the United States.

The phrases are all lyrics from her current album, 1989, which has sold more than 4 million copies in the US.

The trademark ruling prohibits others from using her lyrics on items such as t-shirts, stickers and bags.

Laura Westbrook reports.