Media playback is unsupported on your device

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".

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.