Tulisa Contostavlos has pleaded not guilty to charges that she supplied Class A drugs. Outside the court, her solicitor claimed the case had been "manufactured".
Speaking on her behalf, he said: "As has been widely reported, this entire case has been manufactured by the Sunday Sun and Mazher Mahmood, sometimes known as the Fake Sheikh.
"They have spent a large amount of their readers money flying Tulisa and a number of friends first class Las Vegas. There Mahmood posed as a film producer offering her a £3million film contract.
"This case is not simply about drugs supply, it is about the limits which we set on the conduct of journalists. This was a deliberate attempt to target a young woman who is all the more vulnerable because of her celebrity status."
"The law clearly forbids such conduct on the part of the police, and it's ironic that the police should rely on it when it is the work of a journalist. In due course, Tulisa will give a full answer to these allegations in the court proceedings."
Singer and former X Factor judge Tulisa Contostavlos has been interviewed by police investigating an alleged assault at a music festival.
The N-Dubz singer issued a statement earlier this year denying accusations that she assaulted a blogger at V Festival in Chelmsford, Essex, but police have continued to investigate the incident.
Tulisa went voluntarily to an interview at a police station in Chelmsford today. Essex Police spokeswoman said:
"Officers are investigating an allegation of assault that is said to have occurred at the V Festival this year. Two people attended voluntary interviews today. Nobody has been arrested and inquiries are continuing."
N-Dubz rapper Dappy has denied sparking a petrol station brawl because he was "disrespected" by two teenage women who called him "boring".
The 25-year-old is charged with affray, two counts of common assault and one of assault by beating in connection with the fight at the Shell garage in Woodbridge Road, Guildford, Surrey, at about 3.30am on February 28 last year.
The trial at Guildford Crown Court has heard that Dappy had been out that night celebrating at a nightclub the release of his new single Rockstar featuring Queen guitarist Brian May.
N-Dubz rapper Dappy sparked a "mob attack" at a petrol station when he spat at two girls who refused to get into a car with him and two friends, a court has heard.
Prosecutors said the 25-year-old singer spat at and insulted the girls after they turned down the invite at a Shell garage in Guildford, Surrey, in the early hours of February 28 last year, before spitting at another man, David Jenkins, who had defended them.
Prosecuting barrister Brian Stork told the jury at Guildford Crown Court that Dappy swung a punch at Mr Jenkins, which launched the "mob-handed, utterly unlawful and aggressive attack."
Two other men, Kieran Vassell and Alfred Miller, who had arrived in a second Mercedes car with other unidentified men, joined the attack, he said. Mr Stork showed the jury brief CCTV footage from the garage of the brawl.
Dappy, who is charged under his real name of Costadinos Contostavlos, denies two counts of common assault on the two women, one of assault by beating, of Mr Jenkins, and one of affray. The trial continues.