Singer BoA is currently preparing for one of Japan's biggest summer rock festivals, the�2011 Summer Sonic. On August 13th, BoA tweeted, "2011 Summer Sonic" and attached a photo of herself in front of the event's poster. "Summer Sonic" is a Japanese rock festival that's heavily influenced by the musical cultures of Tokyo and Osaka.�BoA has been invited to be part of the lineup this year. The pictures shows a fierce-looking BoA with smokey makeup and her hair pulled back into a sleek ponytail. Her charisma in the picture has been attracting many views, as fans complimented the star for her mature look. Netizens commented, "Show Japan a remarkable performance before you return" and "The intense smokey-eyed look is impressive". Source & Photo: OSEN via Nate