Niall Horan plans to get ''really fat'' this Christmas.

The One Direction singer is taking a well-deserved break from the limelight next week and intends to undo all his personal trainer's hard work by stuffing his face with as much festive food as possible.

Speaking after their live performance on 'The X Factor' USA final last night (19.12.13), Niall joked: ''I think we're all just going to go home be with our families for a little bit, eat lots of food and get really fat.''

Quizzed by host Mario Lopez whether the boys had been naughty or nice for Santa this year, notorious womanizer Harry Styles - who has dated Taylor Swift, Cara Delevingne and most recently Kendall Jenner in 2013 - suggested he deserved presents for his glowing behavior.

He joked: ''I think I've been pretty nice this year actually, yeah.''

The British boy band - who came third on the British 'X Factor' in 2010 - took to the stage to perform their new single 'Midnight Memories' and caused a frenzy amongst the female members of the audience.

The group - also formed of Louis Tomlinson, Liam Payne and Zayn Malik - are expected to head their separate ways this weekend to celebrate Christmas next week with their loved ones.

Niall's mother, Maura Gallagher, recently revealed: ''It's always a big deal. Niall loves a family Christmas and all the food. We keep it very traditional, with turkey, ham and all the veg. I spend the day steeping the peas and mash and roast potatoes!''