Johnson, 28, denies two counts of sexual activity with the girl, who was 15 years old at the time of the alleged incident.
The footballer's girlfriend, Stacey Flounders, was not alongside him today as he arrived at court for the second day of his trial today.
The jury watched the alleged victim's police interviews today, during which she described how Johnson was her favourite player.
She said: "I got a message from Sunderland player Adam Johnson who I'd idolised for quite a while."
The girl said that, after exchanging messages, she met Johnson on January 17 last year, when he signed two Sunderland shirts for her.
She then explained how the player continued to message her, talking about getting a "thank-you kiss".
"I was well up for it. It was a surreal type of thing," she told the police officer.
"I met up with him again. I gave him his thank-you kiss and more," she said.
The girl described how Johnson exchanged WhatsApp messages with her after their first meeting, saying "you owe me for this" and "am I going to get a thank-you kiss?".
The teenager said that at the second meeting, in the player's Range Rover, Johnson said to her: "I've come for my thank-you kiss."
She said she eventually told him "go on then", and they began kissing.
The girl said: "I was kissing him for quite a while."
"He undid the button on my trousers. It took him a while to do that," she said. "He got his hand down my trousers. He started to put his hands in my knickers."
The girl then described to the officer further sexual activity between the pair.
Later in the interview, the police officer asked the girl what Johnson knew about her.
She replied that the player knew how old she was, what school year she was in and where she sat at Sunderland matches. She said Johnson also knew her date of birth.
She said: "He asked me when I was 16."
The jury were also played a second police interview in which the teenager alleged more serious sexual contact at the same meeting she had previously spoken about.
In this video, the girl described again how Johnson allegedly put her hand on his trousers, over his groin. She then described how she performed oral sex on the footballer.
She said: "He put my hand there. He put his hand on my back and pushed me downwards."
The girl told the officer: "He said if I kept on going he would have to have sex with us and stuff like that."
The woman police officer asked her how she felt. She said: "Not very good. I was disappointed in myself."
The girl, who appeared to be wearing school uniform during the second interview at a police station in Durham, became tearful as she told the officer how she was feeling.
She had earlier described how she had tried to block out what had allegedly happened.
The girl said she continued messaging Johnson but when he tried to arrange for them to meet again, but she made up excuses or cancelled at the last minute in an effort to avoid him.
She said: "I didn't want the meetings, but I still wanted the contact. It was good going to the match knowing he had texted me earlier."
When the officer asked her why she did not mention the more serious sexual contact in the first interview, she said there was evidence on text messages to back up everything else she said but not this sex act.
She also said rumours had begun to circulate about the other sexual activity but not about this.
She said she was worried that talking about it "would only make it worse". She added: "It was bad enough already."
The teenager told the officer how she told her father about what happened because "I was getting upset".
"I don't like hiding things from my mum and dad," she said.
After the girl's interviews were played to court, Johnson's lawyer, Orlando Pownall QC, cross-examined the girl and asked why she had told friends to lie about what happened.
She said: "I wanted to keep him [Johnson] out of trouble. I didn't want to get him in more trouble than he was."
The teenager added: "I was scared that people wouldn't believe me. I didn't want to believe that it had happened."
The teenager told the jury: "I tried to forget about it. I was trying to live normally."
The teenager could be seen sobbing on the screens in court about an hour into Mr Pownall's cross-examination. Judge Jonathan Rose ordered a 10-minute break in proceedings.
Flounders has been supporting her boyfriend, with whom she has a child, since his arrest for sexual activity with a child.
Even after he admitted two offences last week, she arrived at his side for the first day of his trial for two further offences on Friday.
But the 26-year-old did not arrive with Johnson at Bradford Crown Court today.
The England midfielder is accused of abusing "his revered position in society" when he had sexual contact with the teenager "in a way that he knew was morally and legally wrong".
He is charged with two counts of sexual activity with a child.
The jury at Bradford Crown Court was told last week that the 15-year-old fan had an "enormous crush on him" and idolised him.
Johnson, who denies the charges, was contacted by the girl via Facebook and the two began exchanging messages before they finally met so he could sign shirts for her.
Prosecutor Kate Blackwell QC said after this first meeting the two joked in their messages about whether Johnson deserved a "thank-you kiss" and they met again.
She then described how the two engaged in sexual activity in the player's black Range Rover at this second meeting.
Johnson has already admitted one count of sexual activity with a child and another of meeting a child following sexual grooming.
Ms Blackwell said: "The Crown's case is that he is guilty of further and more serious sexual activity."
The court heard on Friday that the former £50,000-a-week ($108,600) Sunderland winger sent a message to the schoolgirl saying he "just wanted to get your jeans off" seconds before he told his girlfriend their baby "looks class".
The trial continues.
- Daily Mail
