Sugababe Amelle Berrabah has been banned from driving for 14 months after admitting drink-driving.
The 26-year-old is sorry for her "exceptionally silly" actions, her lawyer told Highbury Corner Magistrates' Court in London.
She was also fined £2,000 for driving with excess alcohol.
Berrabah, who was wearing a pale grey silk blouse, black trousers and black high heels, was surrounded by photographers as she got out of a silver Mercedes people carrier for the court appearance.
James O'Brien, representing the singer, told the court that due to the media interest in her she would find it difficult to use public transport.
"Because of her rather unusual situation, her use of public transport will be difficult if not impossible," he said.
"She tends to draw huge interest and huge crowds wherever she goes. She finds that personally quite disturbing and she finds it threatening at times. If she were to use public transport she would fear for her own safety and the safety of others."
But District Judge Ian Baker told the pop star, who was arrested on September 23 at the wheel of her Mercedes: "One can take an awful lot of taxis for the same cost of running such a car for a year."
Mr O'Brien said the defendant would find it difficult to carry out her work commitments as well as charity work for hospitals and cancer research if she was banned from driving.
In addition, Berrabah, of Wandsworth, south-west London, made weekly visits to help her mother in Aldershot, Hampshire, following a knee replacement operation, he said.