The N-Dubz singer has pleaded not guilty to assault following an alleged incident at V Festival in Chelmsford last summer.
Tulisa has been accused of striking fellow guest Vas Morgan at the music festival during a drunken altercation - but a rep for Tulisa has said she "strongly denies" 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."
The former X Factor judge looked sombre as she arrived at the magistrates' court dressed in all-black on Monday morning (19 May). The man she is accused of punching, blogger Mr Morgan, was also present at the first day of the trial.
It's thought the trial will last until Wednesday.
More to follow…