The former X Factor judge has been accused of attacking blogger Savvas Morgan during an altercation at the Chelmsford site of the music festival in August 2013.
She has "strongly denied" the charge.
In a statement released at the time, her spokesperson said: "Tulisa strongly denies assaulting Mr Morgan. She specifically denies punching Mr Morgan in the eye.
"She has placed this matter in the hands of her lawyers for immediate and appropriate action."
Tulisa, 25, was pictured arriving at the Chelmsford Magistrates' Court this morning, where it had been expected the trial would reach a verdict.
Both Tulisa and Mr Morgan have been giving evidence in court this week. However, judge Angus Hamilton has now adjourned the trial until at least 2 July so that further witnesses can be called.
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