Me too! Though it was my birthday on the 24th, and it's been more like a month - but I've gained 5kg.
While my taste buds have been celebrating, the down side is that I get grumpy and miserable when I overeat. So there's a cost other than feeling a bulge in my midriff that's pretty uncomfortable.
So today is a great time to turn that around. Good luck and it's good to hear that I'm not the only one that can let a little bit of a good thing turn into too much and then a bad thing. Happy new year.