In what year was the album “ダイヤモンドプリンセスの憂鬱” released by BiBi?

In what year was the album “ダイヤモンドプリンセスの憂鬱” released by BiBi?: The album “ダイヤモンドプリンセスの憂鬱” was released in 2011 by BiBi, featuring 5 tracks.
What is the most successful song from the album “ダイヤモンドプリンセスの憂鬱” by BiBi?: “ダイヤモンドプリンセスの憂鬱” is the biggest hit from the album “ダイヤモンドプリンセスの憂鬱” by BiBi.

Other artists of J-pop