In order to get through the day, Nicole - who was devastated when it emerged last year that Liam had fathered a love child with US writer Liza Ghorbani - invited her closest friends along for a boozy bender, including her former bandmate Melanie Blatt.
A source told The Sun newspaper: ''Nicole knew clearing out the flat would be hard so she invited a load of friends along, including Melanie Blatt.''
The former couple's Big Apple apartment will no doubt be going up for sale shortly as they have already put their London home on the market for £4.5 million.
Nevertheless, Nicole appeared to be in good spirits as she partied the night away with her friends.
The insider added: ''She hit the town and had a brilliant night with all of her mates. She was overheard seeking out where all the best parties were on.
''Nicole wanted to make the whole thing into a positive experience and leave the city with loads of good memories.
''She's been through the mill with Liam but she's in a really good place right now and has a new lease of life.''
Nicole and Liam - who have 12-year-old son Gene together - were granted a speedy divorce in March within just 68 seconds of the judge assessing the case.
The former Oasis rocker admitted adultery and swiftly moved on to date his ex-manager Debbie Gwyther, who he is now living with.
All I Want For Christmas is widely regarded as one of the best festive tunes every year
Pearl Jam announced 14 dates in the UK and Europe in June and July 2018.