BoA has just announced some exciting news through her Twitter account! The singer is preparing to make her long-awaited comeback in Japan with a new single, and it seems like it'll be dropping fairly soon. On October 1st, BoA tweeted, "Many ppl asking me when I'm gonna release my next single in Japan... I'm preparing my single now.. So you'll be able to listen to it soon!" Following up, the singer updated her production status on the 6th by hinting at a new PV.�"Heading to the set for my new music video... (?????)?." BoA also announced that she'll be holding a solo concert this Christmas as well. "Forgot to mention this.. We confirmed 2011 Christmas concert (2011 BoA the live X-mas) in Tokyo for two days. December 10, 11!! Can't wait!!" Stay tuned for more info on this highly-anticipated comeback! Source: BoA's Twitter