So I used to listen to anime music by Mizuki Nana. The thing is, this was very long ago.
Recently I have been noticing Mizuki Nana appearing in Japanese comedy shows (and Freeze!) and looking at her, I swear she isn't the same Mizuki Nana that has done anime-based music.
Are there two people in Japan's celebrity sphere going by Mizuki Nana, one a seiyuu/singer, the other a comedian? I see no history of Mizuki Nana doing comedy stuff on Wikipedia leading me to further think there are two using this name.