Tulisa Contostavlos
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Tulisa Contostavlos: 'I have never dealt drugs'

21 July 2014 Last updated at 14:19 BST

Former X Factor judge Tulisa Contostavlos's trial over drugs allegations has collapsed.

Judge Alistair McCreath told Southwark Crown Court he believed prosecution witness, Sun on Sunday investigative reporter Mazher Mahmood had lied to the court.

Speaking outside court the singer said she was thankful that "lies had been uncovered".

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