Tulisa Contostavlos punched the air with delight and hugged supporters after her trial was thrown out at Southwark Crown Court.
The former X Factor judge had been accused of brokering a cocaine deal with an undercover reporter, a charge she strongly denied throughout.
The judge threw out the case after deciding there were "strong grounds" to believe that the undercover reporter Mazher Mahmood had "lied" at a pre-trial hearing.
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The 74-year-old was hanging decorations on the grave for Easter when the freak accident happened, according to local authorities.
Police had issued an urgent appeal to trace Malakhi Chijiutomi-Ghosh, who needs medication three times a day.