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3 January 2012, 16:51
Harry, Louis, Zayn, Niall and Liam spent 31st December at their London flat.
One Direction have revealed that their New Year's party was "crazy".
Photos of Harry Styles, Louis Tomlinson, Zayn Malik, Niall Horan and Liam Payne's posted on Twitter show the group posing with female guests at the private bash.
And Louis admitted that the party was a night to remember.
"Our New Year's party was absolutely crazy!!" he wrote on Twitter.
One photo that appeared on Twitter saw Harry posing with a female guest, which has sparked speculation that he has moved on from Caroline Flack.
The 17-year-old star has been romantically linked to The Xtra Factor host in recent months, but Caroline is understood to have spent Christmas and New Year in India.