Kajiura Yuki ~ to participate in the Sword Art Online: Sing All Overtures event

あ、そうなんです2015/02/01に行なわれるスペシャルイベント、「ソードアート・オンライン Sing All Overtures」に、私も参加させて頂く事になりました(´▽｀)。わくわく。http://t.co/O9I2moQ5ZU
— 梶浦由記 Yuki Kajiura (@Fion0806) November 10, 2014

Kajiura Yuki also announced via twitter today that she will be participating in the Sword Art Online: Sing All Overtures event.

source

The event is scheduled to take place at the Pacifico Yokohama convention centre on the 1st Feb 2015, 6pm.

The seiyuu cast for SAO are also scheduled to attend the event.  They are:
Yoshitsugu Matsuoka / Tomatsu Haruka / Sawashiro Miyuki / Ayana Taketatsu / Kanae Itō / Takagaki Ayahi / Rina Hidaka / Saori Hayami / Aoi Yūki

Artists who are attending the event include Kajiura Yuki, LiSA, Eir Aoi / Haruna Luna.

Preference to buy tickets to the event will be given to those who purchased the SAOII vol.1 DVD / BD Limited Edition sets. (ソードアート・オンラインⅡ」第1巻(完全生産限定版) Blu-ray＆DVD)  I'm not entirely certain how one goes about applying to get preference to buy tickets first.  Maybe they'll have more details on their website later.  They also intend to sell general tickets.

I'm don't really know what the event is suppose to be about but I think music will definitely play some part in the event since the soundtrack composer for both SAOI and II and the theme song performers are scheduled to attend the event.

That's all from me for now. :)