A group of teenagers "celebrated" after carrying out a fatal knife attack on a man who gatecrashed a girl's 16th birthday party, a court has heard.
Lewis Blackman, 19, was stabbed 14 times after being chased from the rented flat in Earl's Court, west London, on 18 February.
Six boys, including four 17-year-olds and two 16-year-olds, are on trial at the Old Bailey accused of his murder and causing violent disorder.
They deny all charges.
The court heard the girl circulated invitations on Snapchat and was careful only to invite people from Hackney to the flat, rented through the Airbnb website.
However, Mr Blackman, from Camden, turned up uninvited as part of a group of 10
Jurors were told the girl knew of "history" from men between the two areas.