Tube passenger Jacqueline Woodhouse could be jailed on Tuesday after she admitted hurling racist abuse at fellow passengers, a rant that appeared on YouTube.
Woodhouse, 42, directed an expletive-ridden rant at passengers on the Central line between St Paul's and Mile End stations on 23 January.
Police launched an investigation after a seven-minute video of the verbal assault was uploaded to YouTube, where it was viewed more than 200,000 times.
The video was filmed by Galbant Juttla and begins with Woodhouse shouting: "All f****** foreign f****** s*** heads."
Woodhouse of Romford, Essex, turns to other passengers and asks: "Where do you come from? Where do you come from? Where do you come from?
"All over the world, f****** jokers. F****** country's a f****** joke.
"I would like to know if any of you are illegal? I am sure like 30% of you are. F****** jokers taking the f****** p***."
She then turns on the Pakistani man sitting next to her, who is singing his national anthem.
"You can f****** sing my f****** dear friend. I hope they f****** catch up with you and shove you off. I will punch you in the face, you are a f****** joke.
"Pakistani f****** losers.
"Ninety per cent of you are f****** illegal. I wouldn't mind if you loved our country."
She then turns on Mr Juttla who assures her he would rather be listening to his music than to her ramblings.
"Oh look he's filming, hello. Hello government," she says leaning into the camera.
"Why don't you tell me where you're from?"
Mr Juttla, from Ilford, Essex, replies: "I am British."
She gets her phone out of her black handbag and looks as if she is filming him too.
"Watch what you are saying," Mr Juttla warns her.
She replies: "I used to live in England and now I live in the United Nations."
As he tells her to keep her mouth shut, adding she has had too much to drink, she becomes extremely agitated and starts screaming.
"It's not your country anyway so what's your problem?" she says.
"It's been overtaken by people like you."
Mr Juttla said he decided to film Woodhouse after she started berating an unidentified black female.
She had drunk an "unknown" quantity of champagne at a retirement party before getting on the Tube at 11pm.
Single father of two Mr Juttla had been attending a funeral of a close family friend that day.
Woodhouse told police she could not remember the rant but recognised it was her in the video.
She was fined following a similar offence on the Docklands Light Railway (DLR) in December 2008. She had verbally abused a male passenger while on a train to Stratford. She asked whether he had paid taxes adding: "I have had enough of it, why don't they go back to where they come from?"
Woodhouse pleaded guilty to one count of causing racially aggravated "harassment, alarm or distress" by using "threatening, abusive or insulting words or behaviour" at Westminster Magistrates' Court on May 1.
She will be sentenced at the same court today.