On 31.08.2009 was Miku's 2nd Birthday Anniversary, this event was held to celebrate it.
http://www.mikufes.jp/

This part contains performance by deadballP (デッドボールP):
-M05. 私は人間じゃないから
-M06. とある娼婦の恋
-M07. 牛乳飲め!
-M08. 木枯らしの朝
-M09. 筆おろし
-M10. 既成事実 (MEGA Mix)

deadballP is quite known for having mature contents in his work, but to think that he performed here with only wearing shimapan is beyond my imagination... lol...
http://deadballp.jp/

You can now buy his latest album "EXIT TUNES PRESENTS THE VERY BEST OF デッドボールP loves 初音ミク" here:
http://www.amazon.co.jp/gp/product/B001U8RHFM?ie=UTF8&tag=kazenomise-22&linkCode=as2&camp=247&creative=7399&creativeASIN=B001U8RHFM

Notes:
- This is a recording of a web live stream, so please excuse the quality, this is already quite decent I think.