Tulisa Contostavlos has denied an assault charge linked to claims she punched a blogger at a music festival.
The 25-year-old singer appeared at Chelmsford Magistrates' Court in Essex where she was facing one count of common assault.
Her assistant Gareth Varey is accused of threatening behaviour, which he also denies.
The charges are linked to an alleged confrontation with a blogger at the V Festival last year.
The singer's spokesman Simon Jones said: "Tulisa has been charged with an offence of common assault, and her PA Gareth Varey with an offence of threatening behaviour.
"Today at court Tulisa and Gareth entered pleas of not guilty to these unfounded allegations and they both look forward to demonstrating their innocence at the forthcoming trial."