So far, there is two. There probably will be a third influenced by Kuroshitsuji II's new main characters.
As of now there are no plans for Kuroshitsuji Season 3 to be made.
In the first Kuroshitsuji Musical there are 7 songs. In the second Kuroshitsuji Musical there are 15 songs.
Yes, they made a second season.
Kuroshitsuji was created by Yana Toboso.
Kuroshitsuji was originally a manga.
A full list of musicals that are based on plays is in related links.
There is no main character from Kuroshitsuji named Claudia. There is only Claude Faustus, who is one of the main characters in Kuroshitsuji II.
Unanswerred questions about kuroshitsuji can be found at the link at the bottom.
Kuroshitsuji is its own show and Drocell is a character in the show.
when people did not have musical instoments they sang and made musicals popular in the year 1872
He made Undertaker laugh and it's unknown as to how he did.
If they are a fan of Kuroshitsuji, I would recommend Hellsing.